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[binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931 \f
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211 \f
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 enum ppc_elf_plt_type {
2317 PLT_UNSET,
2318 PLT_OLD,
2319 PLT_NEW,
2320 PLT_VXWORKS
2321 };
2322
2323 /* PPC ELF linker hash table. */
2324
2325 struct ppc_elf_link_hash_table
2326 {
2327 struct elf_link_hash_table elf;
2328
2329 /* Short-cuts to get to dynamic linker sections. */
2330 asection *got;
2331 asection *relgot;
2332 asection *glink;
2333 asection *plt;
2334 asection *relplt;
2335 asection *dynbss;
2336 asection *relbss;
2337 asection *dynsbss;
2338 asection *relsbss;
2339 elf_linker_section_t sdata[2];
2340 asection *sbss;
2341
2342 /* Shortcut to .__tls_get_addr. */
2343 struct elf_link_hash_entry *tls_get_addr;
2344
2345 /* TLS local dynamic got entry handling. */
2346 union {
2347 bfd_signed_vma refcount;
2348 bfd_vma offset;
2349 } tlsld_got;
2350
2351 /* Offset of PltResolve function in glink. */
2352 bfd_vma glink_pltresolve;
2353
2354 /* Size of reserved GOT entries. */
2355 unsigned int got_header_size;
2356 /* Non-zero if allocating the header left a gap. */
2357 unsigned int got_gap;
2358
2359 /* The type of PLT we have chosen to use. */
2360 enum ppc_elf_plt_type plt_type;
2361
2362 /* Whether we can use the new PLT layout. */
2363 unsigned int can_use_new_plt:1;
2364
2365 /* Set if we should emit symbols for stubs. */
2366 unsigned int emit_stub_syms:1;
2367
2368 /* Small local sym to section mapping cache. */
2369 struct sym_sec_cache sym_sec;
2370
2371 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2372 asection *srelplt2;
2373
2374 /* The .got.plt section (VxWorks only)*/
2375 asection *sgotplt;
2376
2377 /* True if the target system is VxWorks. */
2378 int is_vxworks;
2379
2380 /* The size of PLT entries. */
2381 int plt_entry_size;
2382 /* The distance between adjacent PLT slots. */
2383 int plt_slot_size;
2384 /* The size of the first PLT entry. */
2385 int plt_initial_entry_size;
2386 };
2387
2388 /* Get the PPC ELF linker hash table from a link_info structure. */
2389
2390 #define ppc_elf_hash_table(p) \
2391 ((struct ppc_elf_link_hash_table *) (p)->hash)
2392
2393 /* Create an entry in a PPC ELF linker hash table. */
2394
2395 static struct bfd_hash_entry *
2396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2397 struct bfd_hash_table *table,
2398 const char *string)
2399 {
2400 /* Allocate the structure if it has not already been allocated by a
2401 subclass. */
2402 if (entry == NULL)
2403 {
2404 entry = bfd_hash_allocate (table,
2405 sizeof (struct ppc_elf_link_hash_entry));
2406 if (entry == NULL)
2407 return entry;
2408 }
2409
2410 /* Call the allocation method of the superclass. */
2411 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2412 if (entry != NULL)
2413 {
2414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2416 ppc_elf_hash_entry (entry)->tls_mask = 0;
2417 }
2418
2419 return entry;
2420 }
2421
2422 /* Create a PPC ELF linker hash table. */
2423
2424 static struct bfd_link_hash_table *
2425 ppc_elf_link_hash_table_create (bfd *abfd)
2426 {
2427 struct ppc_elf_link_hash_table *ret;
2428
2429 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2430 if (ret == NULL)
2431 return NULL;
2432
2433 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2434 ppc_elf_link_hash_newfunc))
2435 {
2436 free (ret);
2437 return NULL;
2438 }
2439
2440 ret->elf.init_plt_refcount.refcount = 0;
2441 ret->elf.init_plt_refcount.glist = NULL;
2442 ret->elf.init_plt_offset.offset = 0;
2443 ret->elf.init_plt_offset.glist = NULL;
2444
2445 ret->sdata[0].name = ".sdata";
2446 ret->sdata[0].sym_name = "_SDA_BASE_";
2447 ret->sdata[0].bss_name = ".sbss";
2448
2449 ret->sdata[1].name = ".sdata2";
2450 ret->sdata[1].sym_name = "_SDA2_BASE_";
2451 ret->sdata[1].bss_name = ".sbss2";
2452
2453 ret->plt_entry_size = 12;
2454 ret->plt_slot_size = 8;
2455 ret->plt_initial_entry_size = 72;
2456
2457 ret->is_vxworks = 0;
2458
2459 return &ret->elf.root;
2460 }
2461
2462 /* Create .got and the related sections. */
2463
2464 static bfd_boolean
2465 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2466 {
2467 struct ppc_elf_link_hash_table *htab;
2468 asection *s;
2469 flagword flags;
2470
2471 if (!_bfd_elf_create_got_section (abfd, info))
2472 return FALSE;
2473
2474 htab = ppc_elf_hash_table (info);
2475 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2476 if (s == NULL)
2477 abort ();
2478
2479 if (htab->is_vxworks)
2480 {
2481 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2482 if (!htab->sgotplt)
2483 abort ();
2484 }
2485 else
2486 {
2487 /* The powerpc .got has a blrl instruction in it. Mark it
2488 executable. */
2489 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2490 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2491 if (!bfd_set_section_flags (abfd, s, flags))
2492 return FALSE;
2493 }
2494
2495 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2496 | SEC_LINKER_CREATED | SEC_READONLY);
2497 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2498 if (!htab->relgot
2499 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2500 return FALSE;
2501
2502 return TRUE;
2503 }
2504
2505 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2506 to output sections (just like _bfd_elf_create_dynamic_sections has
2507 to create .dynbss and .rela.bss). */
2508
2509 static bfd_boolean
2510 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2511 {
2512 struct ppc_elf_link_hash_table *htab;
2513 asection *s;
2514 flagword flags;
2515
2516 htab = ppc_elf_hash_table (info);
2517
2518 if (htab->got == NULL
2519 && !ppc_elf_create_got (abfd, info))
2520 return FALSE;
2521
2522 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2523 return FALSE;
2524
2525 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2526 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2527
2528 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2529 htab->glink = s;
2530 if (s == NULL
2531 || !bfd_set_section_alignment (abfd, s, 4))
2532 return FALSE;
2533
2534 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2535 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2536 SEC_ALLOC | SEC_LINKER_CREATED);
2537 htab->dynsbss = s;
2538 if (s == NULL)
2539 return FALSE;
2540
2541 if (! info->shared)
2542 {
2543 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2544 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2545 htab->relsbss = s;
2546 if (s == NULL
2547 || ! bfd_set_section_alignment (abfd, s, 2))
2548 return FALSE;
2549 }
2550
2551 if (htab->is_vxworks
2552 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2553 return FALSE;
2554
2555 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2556 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2557 if (s == NULL)
2558 abort ();
2559
2560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2561 if (htab->plt_type == PLT_VXWORKS)
2562 /* The VxWorks PLT is a loaded section with contents. */
2563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2564 return bfd_set_section_flags (abfd, s, flags);
2565 }
2566
2567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2568
2569 static void
2570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2571 struct elf_link_hash_entry *dir,
2572 struct elf_link_hash_entry *ind)
2573 {
2574 struct ppc_elf_link_hash_entry *edir, *eind;
2575
2576 edir = (struct ppc_elf_link_hash_entry *) dir;
2577 eind = (struct ppc_elf_link_hash_entry *) ind;
2578
2579 if (eind->dyn_relocs != NULL)
2580 {
2581 if (edir->dyn_relocs != NULL)
2582 {
2583 struct ppc_elf_dyn_relocs **pp;
2584 struct ppc_elf_dyn_relocs *p;
2585
2586 /* Add reloc counts against the indirect sym to the direct sym
2587 list. Merge any entries against the same section. */
2588 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2589 {
2590 struct ppc_elf_dyn_relocs *q;
2591
2592 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2593 if (q->sec == p->sec)
2594 {
2595 q->pc_count += p->pc_count;
2596 q->count += p->count;
2597 *pp = p->next;
2598 break;
2599 }
2600 if (q == NULL)
2601 pp = &p->next;
2602 }
2603 *pp = edir->dyn_relocs;
2604 }
2605
2606 edir->dyn_relocs = eind->dyn_relocs;
2607 eind->dyn_relocs = NULL;
2608 }
2609
2610 edir->tls_mask |= eind->tls_mask;
2611 edir->has_sda_refs |= eind->has_sda_refs;
2612
2613 /* If called to transfer flags for a weakdef during processing
2614 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2615 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2616 if (!(ELIMINATE_COPY_RELOCS
2617 && eind->elf.root.type != bfd_link_hash_indirect
2618 && edir->elf.dynamic_adjusted))
2619 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2620
2621 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2622 edir->elf.ref_regular |= eind->elf.ref_regular;
2623 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2624 edir->elf.needs_plt |= eind->elf.needs_plt;
2625
2626 /* If we were called to copy over info for a weak sym, that's all. */
2627 if (eind->elf.root.type != bfd_link_hash_indirect)
2628 return;
2629
2630 /* Copy over the GOT refcount entries that we may have already seen to
2631 the symbol which just became indirect. */
2632 edir->elf.got.refcount += eind->elf.got.refcount;
2633 eind->elf.got.refcount = 0;
2634
2635 /* And plt entries. */
2636 if (eind->elf.plt.plist != NULL)
2637 {
2638 if (edir->elf.plt.plist != NULL)
2639 {
2640 struct plt_entry **entp;
2641 struct plt_entry *ent;
2642
2643 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2644 {
2645 struct plt_entry *dent;
2646
2647 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2648 if (dent->sec == ent->sec && dent->addend == ent->addend)
2649 {
2650 dent->plt.refcount += ent->plt.refcount;
2651 *entp = ent->next;
2652 break;
2653 }
2654 if (dent == NULL)
2655 entp = &ent->next;
2656 }
2657 *entp = edir->elf.plt.plist;
2658 }
2659
2660 edir->elf.plt.plist = eind->elf.plt.plist;
2661 eind->elf.plt.plist = NULL;
2662 }
2663
2664 if (eind->elf.dynindx != -1)
2665 {
2666 if (edir->elf.dynindx != -1)
2667 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2668 edir->elf.dynstr_index);
2669 edir->elf.dynindx = eind->elf.dynindx;
2670 edir->elf.dynstr_index = eind->elf.dynstr_index;
2671 eind->elf.dynindx = -1;
2672 eind->elf.dynstr_index = 0;
2673 }
2674 }
2675
2676 /* Return 1 if target is one of ours. */
2677
2678 static bfd_boolean
2679 is_ppc_elf_target (const struct bfd_target *targ)
2680 {
2681 extern const bfd_target bfd_elf32_powerpc_vec;
2682 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2683 extern const bfd_target bfd_elf32_powerpcle_vec;
2684
2685 return (targ == &bfd_elf32_powerpc_vec
2686 || targ == &bfd_elf32_powerpc_vxworks_vec
2687 || targ == &bfd_elf32_powerpcle_vec);
2688 }
2689
2690 /* Hook called by the linker routine which adds symbols from an object
2691 file. We use it to put .comm items in .sbss, and not .bss. */
2692
2693 static bfd_boolean
2694 ppc_elf_add_symbol_hook (bfd *abfd,
2695 struct bfd_link_info *info,
2696 Elf_Internal_Sym *sym,
2697 const char **namep ATTRIBUTE_UNUSED,
2698 flagword *flagsp ATTRIBUTE_UNUSED,
2699 asection **secp,
2700 bfd_vma *valp)
2701 {
2702 if (sym->st_shndx == SHN_COMMON
2703 && !info->relocatable
2704 && sym->st_size <= elf_gp_size (abfd)
2705 && is_ppc_elf_target (info->hash->creator))
2706 {
2707 /* Common symbols less than or equal to -G nn bytes are automatically
2708 put into .sbss. */
2709 struct ppc_elf_link_hash_table *htab;
2710
2711 htab = ppc_elf_hash_table (info);
2712 if (htab->sbss == NULL)
2713 {
2714 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2715
2716 if (!htab->elf.dynobj)
2717 htab->elf.dynobj = abfd;
2718
2719 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2720 ".sbss",
2721 flags);
2722 if (htab->sbss == NULL)
2723 return FALSE;
2724 }
2725
2726 *secp = htab->sbss;
2727 *valp = sym->st_size;
2728 }
2729
2730 return TRUE;
2731 }
2732 \f
2733 static bfd_boolean
2734 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2735 elf_linker_section_t *lsect)
2736 {
2737 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2738 TRUE, FALSE, TRUE);
2739 if (lsect->sym == NULL)
2740 return FALSE;
2741 if (lsect->sym->root.type == bfd_link_hash_new)
2742 lsect->sym->non_elf = 0;
2743 lsect->sym->ref_regular = 1;
2744 return TRUE;
2745 }
2746
2747 /* Create a special linker section. */
2748
2749 static bfd_boolean
2750 ppc_elf_create_linker_section (bfd *abfd,
2751 struct bfd_link_info *info,
2752 flagword flags,
2753 elf_linker_section_t *lsect)
2754 {
2755 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2756 asection *s;
2757
2758 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2759 | SEC_LINKER_CREATED);
2760
2761 /* Record the first bfd that needs the special sections. */
2762 if (!htab->elf.dynobj)
2763 htab->elf.dynobj = abfd;
2764
2765 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2766 lsect->name,
2767 flags);
2768 if (s == NULL
2769 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2770 return FALSE;
2771 lsect->section = s;
2772
2773 return create_sdata_sym (htab, lsect);
2774 }
2775
2776 /* Find a linker generated pointer with a given addend and type. */
2777
2778 static elf_linker_section_pointers_t *
2779 elf_find_pointer_linker_section
2780 (elf_linker_section_pointers_t *linker_pointers,
2781 bfd_vma addend,
2782 elf_linker_section_t *lsect)
2783 {
2784 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2785 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2786 return linker_pointers;
2787
2788 return NULL;
2789 }
2790
2791 /* Allocate a pointer to live in a linker created section. */
2792
2793 static bfd_boolean
2794 elf_create_pointer_linker_section (bfd *abfd,
2795 elf_linker_section_t *lsect,
2796 struct elf_link_hash_entry *h,
2797 const Elf_Internal_Rela *rel)
2798 {
2799 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2800 elf_linker_section_pointers_t *linker_section_ptr;
2801 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2802 bfd_size_type amt;
2803
2804 BFD_ASSERT (lsect != NULL);
2805
2806 /* Is this a global symbol? */
2807 if (h != NULL)
2808 {
2809 struct ppc_elf_link_hash_entry *eh;
2810
2811 /* Has this symbol already been allocated? If so, our work is done. */
2812 eh = (struct ppc_elf_link_hash_entry *) h;
2813 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2814 rel->r_addend,
2815 lsect))
2816 return TRUE;
2817
2818 ptr_linker_section_ptr = &eh->linker_section_pointer;
2819 }
2820 else
2821 {
2822 /* Allocation of a pointer to a local symbol. */
2823 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2824
2825 /* Allocate a table to hold the local symbols if first time. */
2826 if (!ptr)
2827 {
2828 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2829
2830 amt = num_symbols;
2831 amt *= sizeof (elf_linker_section_pointers_t *);
2832 ptr = bfd_zalloc (abfd, amt);
2833
2834 if (!ptr)
2835 return FALSE;
2836
2837 elf_local_ptr_offsets (abfd) = ptr;
2838 }
2839
2840 /* Has this symbol already been allocated? If so, our work is done. */
2841 if (elf_find_pointer_linker_section (ptr[r_symndx],
2842 rel->r_addend,
2843 lsect))
2844 return TRUE;
2845
2846 ptr_linker_section_ptr = &ptr[r_symndx];
2847 }
2848
2849 /* Allocate space for a pointer in the linker section, and allocate
2850 a new pointer record from internal memory. */
2851 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2852 amt = sizeof (elf_linker_section_pointers_t);
2853 linker_section_ptr = bfd_alloc (abfd, amt);
2854
2855 if (!linker_section_ptr)
2856 return FALSE;
2857
2858 linker_section_ptr->next = *ptr_linker_section_ptr;
2859 linker_section_ptr->addend = rel->r_addend;
2860 linker_section_ptr->lsect = lsect;
2861 *ptr_linker_section_ptr = linker_section_ptr;
2862
2863 linker_section_ptr->offset = lsect->section->size;
2864 lsect->section->size += 4;
2865
2866 #ifdef DEBUG
2867 fprintf (stderr,
2868 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2869 lsect->name, (long) linker_section_ptr->offset,
2870 (long) lsect->section->size);
2871 #endif
2872
2873 return TRUE;
2874 }
2875
2876 static bfd_boolean
2877 update_local_sym_info (bfd *abfd,
2878 Elf_Internal_Shdr *symtab_hdr,
2879 unsigned long r_symndx,
2880 int tls_type)
2881 {
2882 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2883 char *local_got_tls_masks;
2884
2885 if (local_got_refcounts == NULL)
2886 {
2887 bfd_size_type size = symtab_hdr->sh_info;
2888
2889 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2890 local_got_refcounts = bfd_zalloc (abfd, size);
2891 if (local_got_refcounts == NULL)
2892 return FALSE;
2893 elf_local_got_refcounts (abfd) = local_got_refcounts;
2894 }
2895
2896 local_got_refcounts[r_symndx] += 1;
2897 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2898 local_got_tls_masks[r_symndx] |= tls_type;
2899 return TRUE;
2900 }
2901
2902 static bfd_boolean
2903 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2904 asection *sec, bfd_vma addend)
2905 {
2906 struct plt_entry *ent;
2907
2908 if (addend < 32768)
2909 sec = NULL;
2910 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2911 if (ent->sec == sec && ent->addend == addend)
2912 break;
2913 if (ent == NULL)
2914 {
2915 bfd_size_type amt = sizeof (*ent);
2916 ent = bfd_alloc (abfd, amt);
2917 if (ent == NULL)
2918 return FALSE;
2919 ent->next = h->plt.plist;
2920 ent->sec = sec;
2921 ent->addend = addend;
2922 ent->plt.refcount = 0;
2923 h->plt.plist = ent;
2924 }
2925 ent->plt.refcount += 1;
2926 return TRUE;
2927 }
2928
2929 static struct plt_entry *
2930 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2931 {
2932 struct plt_entry *ent;
2933
2934 if (addend < 32768)
2935 sec = NULL;
2936 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2937 if (ent->sec == sec && ent->addend == addend)
2938 break;
2939 return ent;
2940 }
2941
2942 static void
2943 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2944 {
2945 (*_bfd_error_handler)
2946 (_("%B: relocation %s cannot be used when making a shared object"),
2947 abfd,
2948 ppc_elf_howto_table[r_type]->name);
2949 bfd_set_error (bfd_error_bad_value);
2950 }
2951
2952 /* Look through the relocs for a section during the first phase, and
2953 allocate space in the global offset table or procedure linkage
2954 table. */
2955
2956 static bfd_boolean
2957 ppc_elf_check_relocs (bfd *abfd,
2958 struct bfd_link_info *info,
2959 asection *sec,
2960 const Elf_Internal_Rela *relocs)
2961 {
2962 struct ppc_elf_link_hash_table *htab;
2963 Elf_Internal_Shdr *symtab_hdr;
2964 struct elf_link_hash_entry **sym_hashes;
2965 const Elf_Internal_Rela *rel;
2966 const Elf_Internal_Rela *rel_end;
2967 asection *got2, *sreloc;
2968
2969 if (info->relocatable)
2970 return TRUE;
2971
2972 /* Don't do anything special with non-loaded, non-alloced sections.
2973 In particular, any relocs in such sections should not affect GOT
2974 and PLT reference counting (ie. we don't allow them to create GOT
2975 or PLT entries), there's no possibility or desire to optimize TLS
2976 relocs, and there's not much point in propagating relocs to shared
2977 libs that the dynamic linker won't relocate. */
2978 if ((sec->flags & SEC_ALLOC) == 0)
2979 return TRUE;
2980
2981 #ifdef DEBUG
2982 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2983 sec, abfd);
2984 #endif
2985
2986 /* Initialize howto table if not already done. */
2987 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2988 ppc_elf_howto_init ();
2989
2990 htab = ppc_elf_hash_table (info);
2991 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2992 sym_hashes = elf_sym_hashes (abfd);
2993 got2 = bfd_get_section_by_name (abfd, ".got2");
2994 sreloc = NULL;
2995
2996 rel_end = relocs + sec->reloc_count;
2997 for (rel = relocs; rel < rel_end; rel++)
2998 {
2999 unsigned long r_symndx;
3000 enum elf_ppc_reloc_type r_type;
3001 struct elf_link_hash_entry *h;
3002 int tls_type = 0;
3003
3004 r_symndx = ELF32_R_SYM (rel->r_info);
3005 if (r_symndx < symtab_hdr->sh_info)
3006 h = NULL;
3007 else
3008 {
3009 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3010 while (h->root.type == bfd_link_hash_indirect
3011 || h->root.type == bfd_link_hash_warning)
3012 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3013 }
3014
3015 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3016 This shows up in particular in an R_PPC_ADDR32 in the eabi
3017 startup code. */
3018 if (h != NULL
3019 && htab->got == NULL
3020 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3021 {
3022 if (htab->elf.dynobj == NULL)
3023 htab->elf.dynobj = abfd;
3024 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3025 return FALSE;
3026 BFD_ASSERT (h == htab->elf.hgot);
3027 }
3028
3029 r_type = ELF32_R_TYPE (rel->r_info);
3030 switch (r_type)
3031 {
3032 case R_PPC_GOT_TLSLD16:
3033 case R_PPC_GOT_TLSLD16_LO:
3034 case R_PPC_GOT_TLSLD16_HI:
3035 case R_PPC_GOT_TLSLD16_HA:
3036 htab->tlsld_got.refcount += 1;
3037 tls_type = TLS_TLS | TLS_LD;
3038 goto dogottls;
3039
3040 case R_PPC_GOT_TLSGD16:
3041 case R_PPC_GOT_TLSGD16_LO:
3042 case R_PPC_GOT_TLSGD16_HI:
3043 case R_PPC_GOT_TLSGD16_HA:
3044 tls_type = TLS_TLS | TLS_GD;
3045 goto dogottls;
3046
3047 case R_PPC_GOT_TPREL16:
3048 case R_PPC_GOT_TPREL16_LO:
3049 case R_PPC_GOT_TPREL16_HI:
3050 case R_PPC_GOT_TPREL16_HA:
3051 if (info->shared)
3052 info->flags |= DF_STATIC_TLS;
3053 tls_type = TLS_TLS | TLS_TPREL;
3054 goto dogottls;
3055
3056 case R_PPC_GOT_DTPREL16:
3057 case R_PPC_GOT_DTPREL16_LO:
3058 case R_PPC_GOT_DTPREL16_HI:
3059 case R_PPC_GOT_DTPREL16_HA:
3060 tls_type = TLS_TLS | TLS_DTPREL;
3061 dogottls:
3062 sec->has_tls_reloc = 1;
3063 /* Fall thru */
3064
3065 /* GOT16 relocations */
3066 case R_PPC_GOT16:
3067 case R_PPC_GOT16_LO:
3068 case R_PPC_GOT16_HI:
3069 case R_PPC_GOT16_HA:
3070 /* This symbol requires a global offset table entry. */
3071 if (htab->got == NULL)
3072 {
3073 if (htab->elf.dynobj == NULL)
3074 htab->elf.dynobj = abfd;
3075 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3076 return FALSE;
3077 }
3078 if (h != NULL)
3079 {
3080 h->got.refcount += 1;
3081 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3082 }
3083 else
3084 /* This is a global offset table entry for a local symbol. */
3085 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3086 return FALSE;
3087 break;
3088
3089 /* Indirect .sdata relocation. */
3090 case R_PPC_EMB_SDAI16:
3091 if (info->shared)
3092 {
3093 bad_shared_reloc (abfd, r_type);
3094 return FALSE;
3095 }
3096 if (htab->sdata[0].section == NULL
3097 && !ppc_elf_create_linker_section (abfd, info, 0,
3098 &htab->sdata[0]))
3099 return FALSE;
3100 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3101 h, rel))
3102 return FALSE;
3103 if (h != NULL)
3104 {
3105 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3106 h->non_got_ref = TRUE;
3107 }
3108 break;
3109
3110 /* Indirect .sdata2 relocation. */
3111 case R_PPC_EMB_SDA2I16:
3112 if (info->shared)
3113 {
3114 bad_shared_reloc (abfd, r_type);
3115 return FALSE;
3116 }
3117 if (htab->sdata[1].section == NULL
3118 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3119 &htab->sdata[1]))
3120 return FALSE;
3121 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3122 h, rel))
3123 return FALSE;
3124 if (h != NULL)
3125 {
3126 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3127 h->non_got_ref = TRUE;
3128 }
3129 break;
3130
3131 case R_PPC_SDAREL16:
3132 if (info->shared)
3133 {
3134 bad_shared_reloc (abfd, r_type);
3135 return FALSE;
3136 }
3137 if (htab->sdata[0].sym == NULL
3138 && !create_sdata_sym (htab, &htab->sdata[0]))
3139 return FALSE;
3140 if (h != NULL)
3141 {
3142 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3143 h->non_got_ref = TRUE;
3144 }
3145 break;
3146
3147 case R_PPC_EMB_SDA2REL:
3148 if (info->shared)
3149 {
3150 bad_shared_reloc (abfd, r_type);
3151 return FALSE;
3152 }
3153 if (htab->sdata[1].sym == NULL
3154 && !create_sdata_sym (htab, &htab->sdata[1]))
3155 return FALSE;
3156 if (h != NULL)
3157 {
3158 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3159 h->non_got_ref = TRUE;
3160 }
3161 break;
3162
3163 case R_PPC_EMB_SDA21:
3164 case R_PPC_EMB_RELSDA:
3165 if (info->shared)
3166 {
3167 bad_shared_reloc (abfd, r_type);
3168 return FALSE;
3169 }
3170 if (htab->sdata[0].sym == NULL
3171 && !create_sdata_sym (htab, &htab->sdata[0]))
3172 return FALSE;
3173 if (htab->sdata[1].sym == NULL
3174 && !create_sdata_sym (htab, &htab->sdata[1]))
3175 return FALSE;
3176 if (h != NULL)
3177 {
3178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3179 h->non_got_ref = TRUE;
3180 }
3181 break;
3182
3183 case R_PPC_EMB_NADDR32:
3184 case R_PPC_EMB_NADDR16:
3185 case R_PPC_EMB_NADDR16_LO:
3186 case R_PPC_EMB_NADDR16_HI:
3187 case R_PPC_EMB_NADDR16_HA:
3188 if (info->shared)
3189 {
3190 bad_shared_reloc (abfd, r_type);
3191 return FALSE;
3192 }
3193 if (h != NULL)
3194 h->non_got_ref = TRUE;
3195 break;
3196
3197 case R_PPC_PLT32:
3198 case R_PPC_PLTREL24:
3199 case R_PPC_PLTREL32:
3200 case R_PPC_PLT16_LO:
3201 case R_PPC_PLT16_HI:
3202 case R_PPC_PLT16_HA:
3203 #ifdef DEBUG
3204 fprintf (stderr, "Reloc requires a PLT entry\n");
3205 #endif
3206 /* This symbol requires a procedure linkage table entry. We
3207 actually build the entry in finish_dynamic_symbol,
3208 because this might be a case of linking PIC code without
3209 linking in any dynamic objects, in which case we don't
3210 need to generate a procedure linkage table after all. */
3211
3212 if (h == NULL)
3213 {
3214 /* It does not make sense to have a procedure linkage
3215 table entry for a local symbol. */
3216 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3217 "local symbol"),
3218 abfd,
3219 sec,
3220 (long) rel->r_offset,
3221 ppc_elf_howto_table[r_type]->name);
3222 bfd_set_error (bfd_error_bad_value);
3223 return FALSE;
3224 }
3225 else
3226 {
3227 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3228
3229 h->needs_plt = 1;
3230 if (!update_plt_info (abfd, h, got2, addend))
3231 return FALSE;
3232 }
3233 break;
3234
3235 /* The following relocations don't need to propagate the
3236 relocation if linking a shared object since they are
3237 section relative. */
3238 case R_PPC_SECTOFF:
3239 case R_PPC_SECTOFF_LO:
3240 case R_PPC_SECTOFF_HI:
3241 case R_PPC_SECTOFF_HA:
3242 case R_PPC_DTPREL16:
3243 case R_PPC_DTPREL16_LO:
3244 case R_PPC_DTPREL16_HI:
3245 case R_PPC_DTPREL16_HA:
3246 case R_PPC_TOC16:
3247 break;
3248
3249 case R_PPC_REL16:
3250 case R_PPC_REL16_LO:
3251 case R_PPC_REL16_HI:
3252 case R_PPC_REL16_HA:
3253 htab->can_use_new_plt = 1;
3254 break;
3255
3256 /* These are just markers. */
3257 case R_PPC_TLS:
3258 case R_PPC_EMB_MRKREF:
3259 case R_PPC_NONE:
3260 case R_PPC_max:
3261 break;
3262
3263 /* These should only appear in dynamic objects. */
3264 case R_PPC_COPY:
3265 case R_PPC_GLOB_DAT:
3266 case R_PPC_JMP_SLOT:
3267 case R_PPC_RELATIVE:
3268 break;
3269
3270 /* These aren't handled yet. We'll report an error later. */
3271 case R_PPC_ADDR30:
3272 case R_PPC_EMB_RELSEC16:
3273 case R_PPC_EMB_RELST_LO:
3274 case R_PPC_EMB_RELST_HI:
3275 case R_PPC_EMB_RELST_HA:
3276 case R_PPC_EMB_BIT_FLD:
3277 break;
3278
3279 /* This refers only to functions defined in the shared library. */
3280 case R_PPC_LOCAL24PC:
3281 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3282 htab->plt_type = PLT_OLD;
3283 break;
3284
3285 /* This relocation describes the C++ object vtable hierarchy.
3286 Reconstruct it for later use during GC. */
3287 case R_PPC_GNU_VTINHERIT:
3288 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3289 return FALSE;
3290 break;
3291
3292 /* This relocation describes which C++ vtable entries are actually
3293 used. Record for later use during GC. */
3294 case R_PPC_GNU_VTENTRY:
3295 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3296 return FALSE;
3297 break;
3298
3299 /* We shouldn't really be seeing these. */
3300 case R_PPC_TPREL32:
3301 if (info->shared)
3302 info->flags |= DF_STATIC_TLS;
3303 goto dodyn;
3304
3305 /* Nor these. */
3306 case R_PPC_DTPMOD32:
3307 case R_PPC_DTPREL32:
3308 goto dodyn;
3309
3310 case R_PPC_TPREL16:
3311 case R_PPC_TPREL16_LO:
3312 case R_PPC_TPREL16_HI:
3313 case R_PPC_TPREL16_HA:
3314 if (info->shared)
3315 info->flags |= DF_STATIC_TLS;
3316 goto dodyn;
3317
3318 case R_PPC_REL32:
3319 if (h == NULL
3320 && got2 != NULL
3321 && (sec->flags & SEC_CODE) != 0
3322 && (info->shared || info->pie)
3323 && htab->plt_type == PLT_UNSET)
3324 {
3325 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3326 the start of a function, which assembles to a REL32
3327 reference to .got2. If we detect one of these, then
3328 force the old PLT layout because the linker cannot
3329 reliably deduce the GOT pointer value needed for
3330 PLT call stubs. */
3331 asection *s;
3332
3333 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3334 r_symndx);
3335 if (s == got2)
3336 htab->plt_type = PLT_OLD;
3337 }
3338 if (h == NULL || h == htab->elf.hgot)
3339 break;
3340 goto dodyn1;
3341
3342 case R_PPC_REL24:
3343 case R_PPC_REL14:
3344 case R_PPC_REL14_BRTAKEN:
3345 case R_PPC_REL14_BRNTAKEN:
3346 if (h == NULL)
3347 break;
3348 if (h == htab->elf.hgot)
3349 {
3350 if (htab->plt_type == PLT_UNSET)
3351 htab->plt_type = PLT_OLD;
3352 break;
3353 }
3354 /* fall through */
3355
3356 case R_PPC_ADDR32:
3357 case R_PPC_ADDR24:
3358 case R_PPC_ADDR16:
3359 case R_PPC_ADDR16_LO:
3360 case R_PPC_ADDR16_HI:
3361 case R_PPC_ADDR16_HA:
3362 case R_PPC_ADDR14:
3363 case R_PPC_ADDR14_BRTAKEN:
3364 case R_PPC_ADDR14_BRNTAKEN:
3365 case R_PPC_UADDR32:
3366 case R_PPC_UADDR16:
3367 dodyn1:
3368 if (h != NULL && !info->shared)
3369 {
3370 /* We may need a plt entry if the symbol turns out to be
3371 a function defined in a dynamic object. */
3372 if (!update_plt_info (abfd, h, NULL, 0))
3373 return FALSE;
3374
3375 /* We may need a copy reloc too. */
3376 h->non_got_ref = 1;
3377 }
3378
3379 dodyn:
3380 /* If we are creating a shared library, and this is a reloc
3381 against a global symbol, or a non PC relative reloc
3382 against a local symbol, then we need to copy the reloc
3383 into the shared library. However, if we are linking with
3384 -Bsymbolic, we do not need to copy a reloc against a
3385 global symbol which is defined in an object we are
3386 including in the link (i.e., DEF_REGULAR is set). At
3387 this point we have not seen all the input files, so it is
3388 possible that DEF_REGULAR is not set now but will be set
3389 later (it is never cleared). In case of a weak definition,
3390 DEF_REGULAR may be cleared later by a strong definition in
3391 a shared library. We account for that possibility below by
3392 storing information in the dyn_relocs field of the hash
3393 table entry. A similar situation occurs when creating
3394 shared libraries and symbol visibility changes render the
3395 symbol local.
3396
3397 If on the other hand, we are creating an executable, we
3398 may need to keep relocations for symbols satisfied by a
3399 dynamic library if we manage to avoid copy relocs for the
3400 symbol. */
3401 if ((info->shared
3402 && (MUST_BE_DYN_RELOC (r_type)
3403 || (h != NULL
3404 && (! info->symbolic
3405 || h->root.type == bfd_link_hash_defweak
3406 || !h->def_regular))))
3407 || (ELIMINATE_COPY_RELOCS
3408 && !info->shared
3409 && h != NULL
3410 && (h->root.type == bfd_link_hash_defweak
3411 || !h->def_regular)))
3412 {
3413 struct ppc_elf_dyn_relocs *p;
3414 struct ppc_elf_dyn_relocs **head;
3415
3416 #ifdef DEBUG
3417 fprintf (stderr,
3418 "ppc_elf_check_relocs needs to "
3419 "create relocation for %s\n",
3420 (h && h->root.root.string
3421 ? h->root.root.string : "<unknown>"));
3422 #endif
3423 if (sreloc == NULL)
3424 {
3425 const char *name;
3426
3427 name = (bfd_elf_string_from_elf_section
3428 (abfd,
3429 elf_elfheader (abfd)->e_shstrndx,
3430 elf_section_data (sec)->rel_hdr.sh_name));
3431 if (name == NULL)
3432 return FALSE;
3433
3434 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3435 && strcmp (bfd_get_section_name (abfd, sec),
3436 name + 5) == 0);
3437
3438 if (htab->elf.dynobj == NULL)
3439 htab->elf.dynobj = abfd;
3440 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3441 if (sreloc == NULL)
3442 {
3443 flagword flags;
3444
3445 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3446 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3447 | SEC_ALLOC | SEC_LOAD);
3448 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3449 name,
3450 flags);
3451 if (sreloc == NULL
3452 || ! bfd_set_section_alignment (htab->elf.dynobj,
3453 sreloc, 2))
3454 return FALSE;
3455 }
3456 elf_section_data (sec)->sreloc = sreloc;
3457 }
3458
3459 /* If this is a global symbol, we count the number of
3460 relocations we need for this symbol. */
3461 if (h != NULL)
3462 {
3463 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3464 }
3465 else
3466 {
3467 /* Track dynamic relocs needed for local syms too.
3468 We really need local syms available to do this
3469 easily. Oh well. */
3470
3471 asection *s;
3472 void *vpp;
3473
3474 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3475 sec, r_symndx);
3476 if (s == NULL)
3477 return FALSE;
3478
3479 vpp = &elf_section_data (s)->local_dynrel;
3480 head = (struct ppc_elf_dyn_relocs **) vpp;
3481 }
3482
3483 p = *head;
3484 if (p == NULL || p->sec != sec)
3485 {
3486 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3487 if (p == NULL)
3488 return FALSE;
3489 p->next = *head;
3490 *head = p;
3491 p->sec = sec;
3492 p->count = 0;
3493 p->pc_count = 0;
3494 }
3495
3496 p->count += 1;
3497 if (!MUST_BE_DYN_RELOC (r_type))
3498 p->pc_count += 1;
3499 }
3500
3501 break;
3502 }
3503 }
3504
3505 return TRUE;
3506 }
3507 \f
3508 /* Merge backend specific data from an object file to the output
3509 object file when linking. */
3510
3511 static bfd_boolean
3512 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3513 {
3514 flagword old_flags;
3515 flagword new_flags;
3516 bfd_boolean error;
3517
3518 if (!is_ppc_elf_target (ibfd->xvec)
3519 || !is_ppc_elf_target (obfd->xvec))
3520 return TRUE;
3521
3522 /* Check if we have the same endianess. */
3523 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3524 return FALSE;
3525
3526 new_flags = elf_elfheader (ibfd)->e_flags;
3527 old_flags = elf_elfheader (obfd)->e_flags;
3528 if (!elf_flags_init (obfd))
3529 {
3530 /* First call, no flags set. */
3531 elf_flags_init (obfd) = TRUE;
3532 elf_elfheader (obfd)->e_flags = new_flags;
3533 }
3534
3535 /* Compatible flags are ok. */
3536 else if (new_flags == old_flags)
3537 ;
3538
3539 /* Incompatible flags. */
3540 else
3541 {
3542 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3543 to be linked with either. */
3544 error = FALSE;
3545 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3546 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3547 {
3548 error = TRUE;
3549 (*_bfd_error_handler)
3550 (_("%B: compiled with -mrelocatable and linked with "
3551 "modules compiled normally"), ibfd);
3552 }
3553 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3554 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3555 {
3556 error = TRUE;
3557 (*_bfd_error_handler)
3558 (_("%B: compiled normally and linked with "
3559 "modules compiled with -mrelocatable"), ibfd);
3560 }
3561
3562 /* The output is -mrelocatable-lib iff both the input files are. */
3563 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3564 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3565
3566 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3567 but each input file is either -mrelocatable or -mrelocatable-lib. */
3568 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3569 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3570 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3571 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3572
3573 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3574 any module uses it. */
3575 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3576
3577 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3578 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3579
3580 /* Warn about any other mismatches. */
3581 if (new_flags != old_flags)
3582 {
3583 error = TRUE;
3584 (*_bfd_error_handler)
3585 (_("%B: uses different e_flags (0x%lx) fields "
3586 "than previous modules (0x%lx)"),
3587 ibfd, (long) new_flags, (long) old_flags);
3588 }
3589
3590 if (error)
3591 {
3592 bfd_set_error (bfd_error_bad_value);
3593 return FALSE;
3594 }
3595 }
3596
3597 return TRUE;
3598 }
3599 \f
3600 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3601 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3602 int
3603 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3604 struct bfd_link_info *info,
3605 int force_old_plt,
3606 int emit_stub_syms)
3607 {
3608 struct ppc_elf_link_hash_table *htab;
3609 flagword flags;
3610
3611 htab = ppc_elf_hash_table (info);
3612
3613 if (htab->plt_type == PLT_UNSET)
3614 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3615 ? PLT_OLD : PLT_NEW);
3616
3617 htab->emit_stub_syms = emit_stub_syms;
3618
3619 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3620
3621 if (htab->plt_type == PLT_NEW)
3622 {
3623 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3624 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3625
3626 /* The new PLT is a loaded section. */
3627 if (htab->plt != NULL
3628 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3629 return -1;
3630
3631 /* The new GOT is not executable. */
3632 if (htab->got != NULL
3633 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3634 return -1;
3635 }
3636 else
3637 {
3638 /* Stop an unused .glink section from affecting .text alignment. */
3639 if (htab->glink != NULL
3640 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3641 return -1;
3642 }
3643 return htab->plt_type == PLT_NEW;
3644 }
3645 \f
3646 /* Return the section that should be marked against GC for a given
3647 relocation. */
3648
3649 static asection *
3650 ppc_elf_gc_mark_hook (asection *sec,
3651 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3652 Elf_Internal_Rela *rel,
3653 struct elf_link_hash_entry *h,
3654 Elf_Internal_Sym *sym)
3655 {
3656 if (h != NULL)
3657 {
3658 switch (ELF32_R_TYPE (rel->r_info))
3659 {
3660 case R_PPC_GNU_VTINHERIT:
3661 case R_PPC_GNU_VTENTRY:
3662 break;
3663
3664 default:
3665 switch (h->root.type)
3666 {
3667 case bfd_link_hash_defined:
3668 case bfd_link_hash_defweak:
3669 return h->root.u.def.section;
3670
3671 case bfd_link_hash_common:
3672 return h->root.u.c.p->section;
3673
3674 default:
3675 break;
3676 }
3677 }
3678 }
3679 else
3680 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3681
3682 return NULL;
3683 }
3684
3685 /* Update the got, plt and dynamic reloc reference counts for the
3686 section being removed. */
3687
3688 static bfd_boolean
3689 ppc_elf_gc_sweep_hook (bfd *abfd,
3690 struct bfd_link_info *info,
3691 asection *sec,
3692 const Elf_Internal_Rela *relocs)
3693 {
3694 struct ppc_elf_link_hash_table *htab;
3695 Elf_Internal_Shdr *symtab_hdr;
3696 struct elf_link_hash_entry **sym_hashes;
3697 bfd_signed_vma *local_got_refcounts;
3698 const Elf_Internal_Rela *rel, *relend;
3699 asection *got2;
3700
3701 if ((sec->flags & SEC_ALLOC) == 0)
3702 return TRUE;
3703
3704 elf_section_data (sec)->local_dynrel = NULL;
3705
3706 htab = ppc_elf_hash_table (info);
3707 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3708 sym_hashes = elf_sym_hashes (abfd);
3709 local_got_refcounts = elf_local_got_refcounts (abfd);
3710 got2 = bfd_get_section_by_name (abfd, ".got2");
3711
3712 relend = relocs + sec->reloc_count;
3713 for (rel = relocs; rel < relend; rel++)
3714 {
3715 unsigned long r_symndx;
3716 enum elf_ppc_reloc_type r_type;
3717 struct elf_link_hash_entry *h = NULL;
3718
3719 r_symndx = ELF32_R_SYM (rel->r_info);
3720 if (r_symndx >= symtab_hdr->sh_info)
3721 {
3722 struct ppc_elf_dyn_relocs **pp, *p;
3723 struct ppc_elf_link_hash_entry *eh;
3724
3725 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3726 while (h->root.type == bfd_link_hash_indirect
3727 || h->root.type == bfd_link_hash_warning)
3728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3729 eh = (struct ppc_elf_link_hash_entry *) h;
3730
3731 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3732 if (p->sec == sec)
3733 {
3734 /* Everything must go for SEC. */
3735 *pp = p->next;
3736 break;
3737 }
3738 }
3739
3740 r_type = ELF32_R_TYPE (rel->r_info);
3741 switch (r_type)
3742 {
3743 case R_PPC_GOT_TLSLD16:
3744 case R_PPC_GOT_TLSLD16_LO:
3745 case R_PPC_GOT_TLSLD16_HI:
3746 case R_PPC_GOT_TLSLD16_HA:
3747 htab->tlsld_got.refcount -= 1;
3748 /* Fall thru */
3749
3750 case R_PPC_GOT_TLSGD16:
3751 case R_PPC_GOT_TLSGD16_LO:
3752 case R_PPC_GOT_TLSGD16_HI:
3753 case R_PPC_GOT_TLSGD16_HA:
3754 case R_PPC_GOT_TPREL16:
3755 case R_PPC_GOT_TPREL16_LO:
3756 case R_PPC_GOT_TPREL16_HI:
3757 case R_PPC_GOT_TPREL16_HA:
3758 case R_PPC_GOT_DTPREL16:
3759 case R_PPC_GOT_DTPREL16_LO:
3760 case R_PPC_GOT_DTPREL16_HI:
3761 case R_PPC_GOT_DTPREL16_HA:
3762 case R_PPC_GOT16:
3763 case R_PPC_GOT16_LO:
3764 case R_PPC_GOT16_HI:
3765 case R_PPC_GOT16_HA:
3766 if (h != NULL)
3767 {
3768 if (h->got.refcount > 0)
3769 h->got.refcount--;
3770 }
3771 else if (local_got_refcounts != NULL)
3772 {
3773 if (local_got_refcounts[r_symndx] > 0)
3774 local_got_refcounts[r_symndx]--;
3775 }
3776 break;
3777
3778 case R_PPC_REL24:
3779 case R_PPC_REL14:
3780 case R_PPC_REL14_BRTAKEN:
3781 case R_PPC_REL14_BRNTAKEN:
3782 case R_PPC_REL32:
3783 if (h == NULL || h == htab->elf.hgot)
3784 break;
3785 /* Fall thru */
3786
3787 case R_PPC_ADDR32:
3788 case R_PPC_ADDR24:
3789 case R_PPC_ADDR16:
3790 case R_PPC_ADDR16_LO:
3791 case R_PPC_ADDR16_HI:
3792 case R_PPC_ADDR16_HA:
3793 case R_PPC_ADDR14:
3794 case R_PPC_ADDR14_BRTAKEN:
3795 case R_PPC_ADDR14_BRNTAKEN:
3796 case R_PPC_UADDR32:
3797 case R_PPC_UADDR16:
3798 if (info->shared)
3799 break;
3800
3801 case R_PPC_PLT32:
3802 case R_PPC_PLTREL24:
3803 case R_PPC_PLTREL32:
3804 case R_PPC_PLT16_LO:
3805 case R_PPC_PLT16_HI:
3806 case R_PPC_PLT16_HA:
3807 if (h != NULL)
3808 {
3809 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3810 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3811 if (ent->plt.refcount > 0)
3812 ent->plt.refcount -= 1;
3813 }
3814 break;
3815
3816 default:
3817 break;
3818 }
3819 }
3820 return TRUE;
3821 }
3822 \f
3823 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3824
3825 asection *
3826 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3827 {
3828 struct ppc_elf_link_hash_table *htab;
3829
3830 htab = ppc_elf_hash_table (info);
3831 if (htab->plt_type == PLT_NEW
3832 && htab->plt != NULL
3833 && htab->plt->output_section != NULL)
3834 {
3835 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3836 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3837 }
3838
3839 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3840 FALSE, FALSE, TRUE);
3841 return _bfd_elf_tls_setup (obfd, info);
3842 }
3843
3844 /* Run through all the TLS relocs looking for optimization
3845 opportunities. */
3846
3847 bfd_boolean
3848 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3849 struct bfd_link_info *info)
3850 {
3851 bfd *ibfd;
3852 asection *sec;
3853 struct ppc_elf_link_hash_table *htab;
3854
3855 if (info->relocatable || info->shared)
3856 return TRUE;
3857
3858 htab = ppc_elf_hash_table (info);
3859 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3860 {
3861 Elf_Internal_Sym *locsyms = NULL;
3862 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3863
3864 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3865 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3866 {
3867 Elf_Internal_Rela *relstart, *rel, *relend;
3868 int expecting_tls_get_addr;
3869
3870 /* Read the relocations. */
3871 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3872 info->keep_memory);
3873 if (relstart == NULL)
3874 return FALSE;
3875
3876 expecting_tls_get_addr = 0;
3877 relend = relstart + sec->reloc_count;
3878 for (rel = relstart; rel < relend; rel++)
3879 {
3880 enum elf_ppc_reloc_type r_type;
3881 unsigned long r_symndx;
3882 struct elf_link_hash_entry *h = NULL;
3883 char *tls_mask;
3884 char tls_set, tls_clear;
3885 bfd_boolean is_local;
3886
3887 r_symndx = ELF32_R_SYM (rel->r_info);
3888 if (r_symndx >= symtab_hdr->sh_info)
3889 {
3890 struct elf_link_hash_entry **sym_hashes;
3891
3892 sym_hashes = elf_sym_hashes (ibfd);
3893 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3894 while (h->root.type == bfd_link_hash_indirect
3895 || h->root.type == bfd_link_hash_warning)
3896 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3897 }
3898
3899 is_local = FALSE;
3900 if (h == NULL
3901 || !h->def_dynamic)
3902 is_local = TRUE;
3903
3904 r_type = ELF32_R_TYPE (rel->r_info);
3905 switch (r_type)
3906 {
3907 case R_PPC_GOT_TLSLD16:
3908 case R_PPC_GOT_TLSLD16_LO:
3909 case R_PPC_GOT_TLSLD16_HI:
3910 case R_PPC_GOT_TLSLD16_HA:
3911 /* These relocs should never be against a symbol
3912 defined in a shared lib. Leave them alone if
3913 that turns out to be the case. */
3914 expecting_tls_get_addr = 0;
3915 htab->tlsld_got.refcount -= 1;
3916 if (!is_local)
3917 continue;
3918
3919 /* LD -> LE */
3920 tls_set = 0;
3921 tls_clear = TLS_LD;
3922 expecting_tls_get_addr = 1;
3923 break;
3924
3925 case R_PPC_GOT_TLSGD16:
3926 case R_PPC_GOT_TLSGD16_LO:
3927 case R_PPC_GOT_TLSGD16_HI:
3928 case R_PPC_GOT_TLSGD16_HA:
3929 if (is_local)
3930 /* GD -> LE */
3931 tls_set = 0;
3932 else
3933 /* GD -> IE */
3934 tls_set = TLS_TLS | TLS_TPRELGD;
3935 tls_clear = TLS_GD;
3936 expecting_tls_get_addr = 1;
3937 break;
3938
3939 case R_PPC_GOT_TPREL16:
3940 case R_PPC_GOT_TPREL16_LO:
3941 case R_PPC_GOT_TPREL16_HI:
3942 case R_PPC_GOT_TPREL16_HA:
3943 expecting_tls_get_addr = 0;
3944 if (is_local)
3945 {
3946 /* IE -> LE */
3947 tls_set = 0;
3948 tls_clear = TLS_TPREL;
3949 break;
3950 }
3951 else
3952 continue;
3953
3954 case R_PPC_REL14:
3955 case R_PPC_REL14_BRTAKEN:
3956 case R_PPC_REL14_BRNTAKEN:
3957 case R_PPC_REL24:
3958 if (expecting_tls_get_addr
3959 && h != NULL
3960 && h == htab->tls_get_addr)
3961 {
3962 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3963 if (ent != NULL && ent->plt.refcount > 0)
3964 ent->plt.refcount -= 1;
3965 }
3966 expecting_tls_get_addr = 0;
3967 continue;
3968
3969 default:
3970 expecting_tls_get_addr = 0;
3971 continue;
3972 }
3973
3974 if (h != NULL)
3975 {
3976 if (tls_set == 0)
3977 {
3978 /* We managed to get rid of a got entry. */
3979 if (h->got.refcount > 0)
3980 h->got.refcount -= 1;
3981 }
3982 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3983 }
3984 else
3985 {
3986 Elf_Internal_Sym *sym;
3987 bfd_signed_vma *lgot_refs;
3988 char *lgot_masks;
3989
3990 if (locsyms == NULL)
3991 {
3992 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3993 if (locsyms == NULL)
3994 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3995 symtab_hdr->sh_info,
3996 0, NULL, NULL, NULL);
3997 if (locsyms == NULL)
3998 {
3999 if (elf_section_data (sec)->relocs != relstart)
4000 free (relstart);
4001 return FALSE;
4002 }
4003 }
4004 sym = locsyms + r_symndx;
4005 lgot_refs = elf_local_got_refcounts (ibfd);
4006 if (lgot_refs == NULL)
4007 abort ();
4008 if (tls_set == 0)
4009 {
4010 /* We managed to get rid of a got entry. */
4011 if (lgot_refs[r_symndx] > 0)
4012 lgot_refs[r_symndx] -= 1;
4013 }
4014 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4015 tls_mask = &lgot_masks[r_symndx];
4016 }
4017
4018 *tls_mask |= tls_set;
4019 *tls_mask &= ~tls_clear;
4020 }
4021
4022 if (elf_section_data (sec)->relocs != relstart)
4023 free (relstart);
4024 }
4025
4026 if (locsyms != NULL
4027 && (symtab_hdr->contents != (unsigned char *) locsyms))
4028 {
4029 if (!info->keep_memory)
4030 free (locsyms);
4031 else
4032 symtab_hdr->contents = (unsigned char *) locsyms;
4033 }
4034 }
4035 return TRUE;
4036 }
4037 \f
4038 /* Adjust a symbol defined by a dynamic object and referenced by a
4039 regular object. The current definition is in some section of the
4040 dynamic object, but we're not including those sections. We have to
4041 change the definition to something the rest of the link can
4042 understand. */
4043
4044 static bfd_boolean
4045 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4046 struct elf_link_hash_entry *h)
4047 {
4048 struct ppc_elf_link_hash_table *htab;
4049 asection *s;
4050 unsigned int power_of_two;
4051
4052 #ifdef DEBUG
4053 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4054 h->root.root.string);
4055 #endif
4056
4057 /* Make sure we know what is going on here. */
4058 htab = ppc_elf_hash_table (info);
4059 BFD_ASSERT (htab->elf.dynobj != NULL
4060 && (h->needs_plt
4061 || h->u.weakdef != NULL
4062 || (h->def_dynamic
4063 && h->ref_regular
4064 && !h->def_regular)));
4065
4066 /* Deal with function syms. */
4067 if (h->type == STT_FUNC
4068 || h->needs_plt)
4069 {
4070 /* Clear procedure linkage table information for any symbol that
4071 won't need a .plt entry. */
4072 struct plt_entry *ent;
4073 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4074 if (ent->plt.refcount > 0)
4075 break;
4076 if (ent == NULL
4077 || SYMBOL_CALLS_LOCAL (info, h)
4078 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4079 && h->root.type == bfd_link_hash_undefweak))
4080 {
4081 /* A PLT entry is not required/allowed when:
4082
4083 1. We are not using ld.so; because then the PLT entry
4084 can't be set up, so we can't use one. In this case,
4085 ppc_elf_adjust_dynamic_symbol won't even be called.
4086
4087 2. GC has rendered the entry unused.
4088
4089 3. We know for certain that a call to this symbol
4090 will go to this object, or will remain undefined. */
4091 h->plt.plist = NULL;
4092 h->needs_plt = 0;
4093 }
4094 return TRUE;
4095 }
4096 else
4097 h->plt.plist = NULL;
4098
4099 /* If this is a weak symbol, and there is a real definition, the
4100 processor independent code will have arranged for us to see the
4101 real definition first, and we can just use the same value. */
4102 if (h->u.weakdef != NULL)
4103 {
4104 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4105 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4106 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4107 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4108 if (ELIMINATE_COPY_RELOCS)
4109 h->non_got_ref = h->u.weakdef->non_got_ref;
4110 return TRUE;
4111 }
4112
4113 /* This is a reference to a symbol defined by a dynamic object which
4114 is not a function. */
4115
4116 /* If we are creating a shared library, we must presume that the
4117 only references to the symbol are via the global offset table.
4118 For such cases we need not do anything here; the relocations will
4119 be handled correctly by relocate_section. */
4120 if (info->shared)
4121 return TRUE;
4122
4123 /* If there are no references to this symbol that do not use the
4124 GOT, we don't need to generate a copy reloc. */
4125 if (!h->non_got_ref)
4126 return TRUE;
4127
4128 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4129 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4130 do this if there are any small data relocations. */
4131 if (ELIMINATE_COPY_RELOCS
4132 && !ppc_elf_hash_entry (h)->has_sda_refs)
4133 {
4134 struct ppc_elf_dyn_relocs *p;
4135 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4136 {
4137 s = p->sec->output_section;
4138 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4139 break;
4140 }
4141
4142 if (p == NULL)
4143 {
4144 h->non_got_ref = 0;
4145 return TRUE;
4146 }
4147 }
4148
4149 if (h->size == 0)
4150 {
4151 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4152 h->root.root.string);
4153 return TRUE;
4154 }
4155
4156 /* We must allocate the symbol in our .dynbss section, which will
4157 become part of the .bss section of the executable. There will be
4158 an entry for this symbol in the .dynsym section. The dynamic
4159 object will contain position independent code, so all references
4160 from the dynamic object to this symbol will go through the global
4161 offset table. The dynamic linker will use the .dynsym entry to
4162 determine the address it must put in the global offset table, so
4163 both the dynamic object and the regular object will refer to the
4164 same memory location for the variable.
4165
4166 Of course, if the symbol is referenced using SDAREL relocs, we
4167 must instead allocate it in .sbss. */
4168
4169 if (ppc_elf_hash_entry (h)->has_sda_refs)
4170 s = htab->dynsbss;
4171 else
4172 s = htab->dynbss;
4173 BFD_ASSERT (s != NULL);
4174
4175 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4176 copy the initial value out of the dynamic object and into the
4177 runtime process image. We need to remember the offset into the
4178 .rela.bss section we are going to use. */
4179 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4180 {
4181 asection *srel;
4182
4183 if (ppc_elf_hash_entry (h)->has_sda_refs)
4184 srel = htab->relsbss;
4185 else
4186 srel = htab->relbss;
4187 BFD_ASSERT (srel != NULL);
4188 srel->size += sizeof (Elf32_External_Rela);
4189 h->needs_copy = 1;
4190 }
4191
4192 /* We need to figure out the alignment required for this symbol. I
4193 have no idea how ELF linkers handle this. */
4194 power_of_two = bfd_log2 (h->size);
4195 if (power_of_two > 4)
4196 power_of_two = 4;
4197
4198 /* Apply the required alignment. */
4199 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4200 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4201 {
4202 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4203 return FALSE;
4204 }
4205
4206 /* Define the symbol as being at this point in the section. */
4207 h->root.u.def.section = s;
4208 h->root.u.def.value = s->size;
4209
4210 /* Increment the section size to make room for the symbol. */
4211 s->size += h->size;
4212
4213 return TRUE;
4214 }
4215 \f
4216 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4217 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4218 specifying the addend on the plt relocation. For -fpic code, the sym
4219 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4220 xxxxxxxx.got2.plt_pic32.<callee>. */
4221
4222 static bfd_boolean
4223 add_stub_sym (struct plt_entry *ent,
4224 struct elf_link_hash_entry *h,
4225 struct bfd_link_info *info)
4226 {
4227 struct elf_link_hash_entry *sh;
4228 size_t len1, len2, len3;
4229 char *name;
4230 const char *stub;
4231 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4232
4233 if (info->shared || info->pie)
4234 stub = ".plt_pic32.";
4235 else
4236 stub = ".plt_call32.";
4237
4238 len1 = strlen (h->root.root.string);
4239 len2 = strlen (stub);
4240 len3 = 0;
4241 if (ent->sec)
4242 len3 = strlen (ent->sec->name);
4243 name = bfd_malloc (len1 + len2 + len3 + 9);
4244 if (name == NULL)
4245 return FALSE;
4246 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4247 if (ent->sec)
4248 memcpy (name + 8, ent->sec->name, len3);
4249 memcpy (name + 8 + len3, stub, len2);
4250 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4251 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4252 if (sh == NULL)
4253 return FALSE;
4254 if (sh->root.type == bfd_link_hash_new)
4255 {
4256 sh->root.type = bfd_link_hash_defined;
4257 sh->root.u.def.section = htab->glink;
4258 sh->root.u.def.value = ent->glink_offset;
4259 sh->ref_regular = 1;
4260 sh->def_regular = 1;
4261 sh->ref_regular_nonweak = 1;
4262 sh->forced_local = 1;
4263 sh->non_elf = 0;
4264 }
4265 return TRUE;
4266 }
4267
4268 /* Allocate NEED contiguous space in .got, and return the offset.
4269 Handles allocation of the got header when crossing 32k. */
4270
4271 static bfd_vma
4272 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4273 {
4274 bfd_vma where;
4275 unsigned int max_before_header;
4276
4277 if (htab->plt_type == PLT_VXWORKS)
4278 {
4279 where = htab->got->size;
4280 htab->got->size += need;
4281 }
4282 else
4283 {
4284 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4285 if (need <= htab->got_gap)
4286 {
4287 where = max_before_header - htab->got_gap;
4288 htab->got_gap -= need;
4289 }
4290 else
4291 {
4292 if (htab->got->size + need > max_before_header
4293 && htab->got->size <= max_before_header)
4294 {
4295 htab->got_gap = max_before_header - htab->got->size;
4296 htab->got->size = max_before_header + htab->got_header_size;
4297 }
4298 where = htab->got->size;
4299 htab->got->size += need;
4300 }
4301 }
4302 return where;
4303 }
4304
4305 /* Allocate space in associated reloc sections for dynamic relocs. */
4306
4307 static bfd_boolean
4308 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4309 {
4310 struct bfd_link_info *info = inf;
4311 struct ppc_elf_link_hash_entry *eh;
4312 struct ppc_elf_link_hash_table *htab;
4313 struct ppc_elf_dyn_relocs *p;
4314
4315 if (h->root.type == bfd_link_hash_indirect)
4316 return TRUE;
4317
4318 if (h->root.type == bfd_link_hash_warning)
4319 /* When warning symbols are created, they **replace** the "real"
4320 entry in the hash table, thus we never get to see the real
4321 symbol in a hash traversal. So look at it now. */
4322 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4323
4324 htab = ppc_elf_hash_table (info);
4325 if (htab->elf.dynamic_sections_created)
4326 {
4327 struct plt_entry *ent;
4328 bfd_boolean doneone = FALSE;
4329 bfd_vma plt_offset = 0, glink_offset = 0;
4330
4331 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4332 if (ent->plt.refcount > 0)
4333 {
4334 /* Make sure this symbol is output as a dynamic symbol. */
4335 if (h->dynindx == -1
4336 && !h->forced_local)
4337 {
4338 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4339 return FALSE;
4340 }
4341
4342 if (info->shared
4343 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4344 {
4345 asection *s = htab->plt;
4346
4347 if (htab->plt_type == PLT_NEW)
4348 {
4349 if (!doneone)
4350 {
4351 plt_offset = s->size;
4352 s->size += 4;
4353 }
4354 ent->plt.offset = plt_offset;
4355
4356 s = htab->glink;
4357 if (!doneone || info->shared || info->pie)
4358 {
4359 glink_offset = s->size;
4360 s->size += GLINK_ENTRY_SIZE;
4361 }
4362 if (!doneone
4363 && !info->shared
4364 && !h->def_regular)
4365 {
4366 h->root.u.def.section = s;
4367 h->root.u.def.value = glink_offset;
4368 }
4369 ent->glink_offset = glink_offset;
4370
4371 if (htab->emit_stub_syms
4372 && !add_stub_sym (ent, h, info))
4373 return FALSE;
4374 }
4375 else
4376 {
4377 if (!doneone)
4378 {
4379 /* If this is the first .plt entry, make room
4380 for the special first entry. */
4381 if (s->size == 0)
4382 s->size += htab->plt_initial_entry_size;
4383
4384 /* The PowerPC PLT is actually composed of two
4385 parts, the first part is 2 words (for a load
4386 and a jump), and then there is a remaining
4387 word available at the end. */
4388 plt_offset = (htab->plt_initial_entry_size
4389 + (htab->plt_slot_size
4390 * ((s->size
4391 - htab->plt_initial_entry_size)
4392 / htab->plt_entry_size)));
4393
4394 /* If this symbol is not defined in a regular
4395 file, and we are not generating a shared
4396 library, then set the symbol to this location
4397 in the .plt. This is required to make
4398 function pointers compare as equal between
4399 the normal executable and the shared library. */
4400 if (! info->shared
4401 && !h->def_regular)
4402 {
4403 h->root.u.def.section = s;
4404 h->root.u.def.value = plt_offset;
4405 }
4406
4407 /* Make room for this entry. */
4408 s->size += htab->plt_entry_size;
4409 /* After the 8192nd entry, room for two entries
4410 is allocated. */
4411 if (htab->plt_type == PLT_OLD
4412 && (s->size - htab->plt_initial_entry_size)
4413 / htab->plt_entry_size
4414 > PLT_NUM_SINGLE_ENTRIES)
4415 s->size += htab->plt_entry_size;
4416 }
4417 ent->plt.offset = plt_offset;
4418 }
4419
4420 /* We also need to make an entry in the .rela.plt section. */
4421 if (!doneone)
4422 {
4423 htab->relplt->size += sizeof (Elf32_External_Rela);
4424
4425 if (htab->plt_type == PLT_VXWORKS)
4426 {
4427 /* Allocate space for the unloaded relocations. */
4428 if (!info->shared)
4429 {
4430 if (ent->plt.offset
4431 == (bfd_vma) htab->plt_initial_entry_size)
4432 {
4433 htab->srelplt2->size
4434 += sizeof (Elf32_External_Rela)
4435 * VXWORKS_PLTRESOLVE_RELOCS;
4436 }
4437
4438 htab->srelplt2->size
4439 += sizeof (Elf32_External_Rela)
4440 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4441 }
4442
4443 /* Every PLT entry has an associated GOT entry in
4444 .got.plt. */
4445 htab->sgotplt->size += 4;
4446 }
4447 doneone = TRUE;
4448 }
4449 }
4450 else
4451 ent->plt.offset = (bfd_vma) -1;
4452
4453 if (!doneone)
4454 {
4455 h->plt.plist = NULL;
4456 h->needs_plt = 0;
4457 }
4458 }
4459 }
4460 else
4461 {
4462 h->plt.plist = NULL;
4463 h->needs_plt = 0;
4464 }
4465
4466 eh = (struct ppc_elf_link_hash_entry *) h;
4467 if (eh->elf.got.refcount > 0)
4468 {
4469 /* Make sure this symbol is output as a dynamic symbol. */
4470 if (eh->elf.dynindx == -1
4471 && !eh->elf.forced_local)
4472 {
4473 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4474 return FALSE;
4475 }
4476
4477 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4478 && !eh->elf.def_dynamic)
4479 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4480 eh->elf.got.offset = (bfd_vma) -1;
4481 else
4482 {
4483 bfd_boolean dyn;
4484 unsigned int need = 0;
4485 if ((eh->tls_mask & TLS_TLS) != 0)
4486 {
4487 if ((eh->tls_mask & TLS_LD) != 0)
4488 need += 8;
4489 if ((eh->tls_mask & TLS_GD) != 0)
4490 need += 8;
4491 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4492 need += 4;
4493 if ((eh->tls_mask & TLS_DTPREL) != 0)
4494 need += 4;
4495 }
4496 else
4497 need += 4;
4498 eh->elf.got.offset = allocate_got (htab, need);
4499 dyn = htab->elf.dynamic_sections_created;
4500 if ((info->shared
4501 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4502 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4503 || eh->elf.root.type != bfd_link_hash_undefweak))
4504 {
4505 /* All the entries we allocated need relocs.
4506 Except LD only needs one. */
4507 if ((eh->tls_mask & TLS_LD) != 0)
4508 need -= 4;
4509 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4510 }
4511 }
4512 }
4513 else
4514 eh->elf.got.offset = (bfd_vma) -1;
4515
4516 if (eh->dyn_relocs == NULL)
4517 return TRUE;
4518
4519 /* In the shared -Bsymbolic case, discard space allocated for
4520 dynamic pc-relative relocs against symbols which turn out to be
4521 defined in regular objects. For the normal shared case, discard
4522 space for relocs that have become local due to symbol visibility
4523 changes. */
4524
4525 if (info->shared)
4526 {
4527 /* Relocs that use pc_count are those that appear on a call insn,
4528 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4529 generated via assembly. We want calls to protected symbols to
4530 resolve directly to the function rather than going via the plt.
4531 If people want function pointer comparisons to work as expected
4532 then they should avoid writing weird assembly. */
4533 if (SYMBOL_CALLS_LOCAL (info, h))
4534 {
4535 struct ppc_elf_dyn_relocs **pp;
4536
4537 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4538 {
4539 p->count -= p->pc_count;
4540 p->pc_count = 0;
4541 if (p->count == 0)
4542 *pp = p->next;
4543 else
4544 pp = &p->next;
4545 }
4546 }
4547
4548 /* Also discard relocs on undefined weak syms with non-default
4549 visibility. */
4550 if (eh->dyn_relocs != NULL
4551 && h->root.type == bfd_link_hash_undefweak)
4552 {
4553 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4554 eh->dyn_relocs = NULL;
4555
4556 /* Make sure undefined weak symbols are output as a dynamic
4557 symbol in PIEs. */
4558 else if (h->dynindx == -1
4559 && !h->forced_local)
4560 {
4561 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4562 return FALSE;
4563 }
4564 }
4565 }
4566 else if (ELIMINATE_COPY_RELOCS)
4567 {
4568 /* For the non-shared case, discard space for relocs against
4569 symbols which turn out to need copy relocs or are not
4570 dynamic. */
4571
4572 if (!h->non_got_ref
4573 && h->def_dynamic
4574 && !h->def_regular)
4575 {
4576 /* Make sure this symbol is output as a dynamic symbol.
4577 Undefined weak syms won't yet be marked as dynamic. */
4578 if (h->dynindx == -1
4579 && !h->forced_local)
4580 {
4581 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4582 return FALSE;
4583 }
4584
4585 /* If that succeeded, we know we'll be keeping all the
4586 relocs. */
4587 if (h->dynindx != -1)
4588 goto keep;
4589 }
4590
4591 eh->dyn_relocs = NULL;
4592
4593 keep: ;
4594 }
4595
4596 /* Finally, allocate space. */
4597 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4598 {
4599 asection *sreloc = elf_section_data (p->sec)->sreloc;
4600 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4601 }
4602
4603 return TRUE;
4604 }
4605
4606 /* Find any dynamic relocs that apply to read-only sections. */
4607
4608 static bfd_boolean
4609 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4610 {
4611 struct ppc_elf_dyn_relocs *p;
4612
4613 if (h->root.type == bfd_link_hash_indirect)
4614 return TRUE;
4615
4616 if (h->root.type == bfd_link_hash_warning)
4617 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4618
4619 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4620 {
4621 asection *s = p->sec->output_section;
4622
4623 if (s != NULL
4624 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4625 == (SEC_READONLY | SEC_ALLOC)))
4626 {
4627 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4628
4629 /* Not an error, just cut short the traversal. */
4630 return FALSE;
4631 }
4632 }
4633 return TRUE;
4634 }
4635
4636 /* Set the sizes of the dynamic sections. */
4637
4638 static bfd_boolean
4639 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4640 struct bfd_link_info *info)
4641 {
4642 struct ppc_elf_link_hash_table *htab;
4643 asection *s;
4644 bfd_boolean relocs;
4645 bfd *ibfd;
4646
4647 #ifdef DEBUG
4648 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4649 #endif
4650
4651 htab = ppc_elf_hash_table (info);
4652 BFD_ASSERT (htab->elf.dynobj != NULL);
4653
4654 if (elf_hash_table (info)->dynamic_sections_created)
4655 {
4656 /* Set the contents of the .interp section to the interpreter. */
4657 if (info->executable)
4658 {
4659 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4660 BFD_ASSERT (s != NULL);
4661 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4662 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4663 }
4664 }
4665
4666 if (htab->plt_type == PLT_OLD)
4667 htab->got_header_size = 16;
4668 else if (htab->plt_type == PLT_NEW)
4669 htab->got_header_size = 12;
4670
4671 /* Set up .got offsets for local syms, and space for local dynamic
4672 relocs. */
4673 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4674 {
4675 bfd_signed_vma *local_got;
4676 bfd_signed_vma *end_local_got;
4677 char *lgot_masks;
4678 bfd_size_type locsymcount;
4679 Elf_Internal_Shdr *symtab_hdr;
4680
4681 if (!is_ppc_elf_target (ibfd->xvec))
4682 continue;
4683
4684 for (s = ibfd->sections; s != NULL; s = s->next)
4685 {
4686 struct ppc_elf_dyn_relocs *p;
4687
4688 for (p = ((struct ppc_elf_dyn_relocs *)
4689 elf_section_data (s)->local_dynrel);
4690 p != NULL;
4691 p = p->next)
4692 {
4693 if (!bfd_is_abs_section (p->sec)
4694 && bfd_is_abs_section (p->sec->output_section))
4695 {
4696 /* Input section has been discarded, either because
4697 it is a copy of a linkonce section or due to
4698 linker script /DISCARD/, so we'll be discarding
4699 the relocs too. */
4700 }
4701 else if (p->count != 0)
4702 {
4703 elf_section_data (p->sec)->sreloc->size
4704 += p->count * sizeof (Elf32_External_Rela);
4705 if ((p->sec->output_section->flags
4706 & (SEC_READONLY | SEC_ALLOC))
4707 == (SEC_READONLY | SEC_ALLOC))
4708 info->flags |= DF_TEXTREL;
4709 }
4710 }
4711 }
4712
4713 local_got = elf_local_got_refcounts (ibfd);
4714 if (!local_got)
4715 continue;
4716
4717 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4718 locsymcount = symtab_hdr->sh_info;
4719 end_local_got = local_got + locsymcount;
4720 lgot_masks = (char *) end_local_got;
4721 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4722 if (*local_got > 0)
4723 {
4724 if (*lgot_masks == (TLS_TLS | TLS_LD))
4725 {
4726 /* If just an LD reloc, we'll just use
4727 htab->tlsld_got.offset. */
4728 htab->tlsld_got.refcount += 1;
4729 *local_got = (bfd_vma) -1;
4730 }
4731 else
4732 {
4733 unsigned int need = 0;
4734 if ((*lgot_masks & TLS_TLS) != 0)
4735 {
4736 if ((*lgot_masks & TLS_GD) != 0)
4737 need += 8;
4738 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4739 need += 4;
4740 if ((*lgot_masks & TLS_DTPREL) != 0)
4741 need += 4;
4742 }
4743 else
4744 need += 4;
4745 *local_got = allocate_got (htab, need);
4746 if (info->shared)
4747 htab->relgot->size += (need
4748 * (sizeof (Elf32_External_Rela) / 4));
4749 }
4750 }
4751 else
4752 *local_got = (bfd_vma) -1;
4753 }
4754
4755 if (htab->tlsld_got.refcount > 0)
4756 {
4757 htab->tlsld_got.offset = allocate_got (htab, 8);
4758 if (info->shared)
4759 htab->relgot->size += sizeof (Elf32_External_Rela);
4760 }
4761 else
4762 htab->tlsld_got.offset = (bfd_vma) -1;
4763
4764 /* Allocate space for global sym dynamic relocs. */
4765 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4766
4767 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4768 {
4769 unsigned int g_o_t = 32768;
4770
4771 /* If we haven't allocated the header, do so now. When we get here,
4772 for old plt/got the got size will be 0 to 32764 (not allocated),
4773 or 32780 to 65536 (header allocated). For new plt/got, the
4774 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4775 if (htab->got->size <= 32768)
4776 {
4777 g_o_t = htab->got->size;
4778 if (htab->plt_type == PLT_OLD)
4779 g_o_t += 4;
4780 htab->got->size += htab->got_header_size;
4781 }
4782
4783 htab->elf.hgot->root.u.def.value = g_o_t;
4784 }
4785
4786 if (htab->glink != NULL && htab->glink->size != 0)
4787 {
4788 htab->glink_pltresolve = htab->glink->size;
4789 /* Space for the branch table. */
4790 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4791 /* Pad out to align the start of PLTresolve. */
4792 htab->glink->size += -htab->glink->size & 15;
4793 htab->glink->size += GLINK_PLTRESOLVE;
4794
4795 if (htab->emit_stub_syms)
4796 {
4797 struct elf_link_hash_entry *sh;
4798 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4799 TRUE, FALSE, FALSE);
4800 if (sh == NULL)
4801 return FALSE;
4802 if (sh->root.type == bfd_link_hash_new)
4803 {
4804 sh->root.type = bfd_link_hash_defined;
4805 sh->root.u.def.section = htab->glink;
4806 sh->root.u.def.value = htab->glink_pltresolve;
4807 sh->ref_regular = 1;
4808 sh->def_regular = 1;
4809 sh->ref_regular_nonweak = 1;
4810 sh->forced_local = 1;
4811 sh->non_elf = 0;
4812 }
4813 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4814 TRUE, FALSE, FALSE);
4815 if (sh == NULL)
4816 return FALSE;
4817 if (sh->root.type == bfd_link_hash_new)
4818 {
4819 sh->root.type = bfd_link_hash_defined;
4820 sh->root.u.def.section = htab->glink;
4821 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4822 sh->ref_regular = 1;
4823 sh->def_regular = 1;
4824 sh->ref_regular_nonweak = 1;
4825 sh->forced_local = 1;
4826 sh->non_elf = 0;
4827 }
4828 }
4829 }
4830
4831 /* We've now determined the sizes of the various dynamic sections.
4832 Allocate memory for them. */
4833 relocs = FALSE;
4834 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4835 {
4836 bfd_boolean strip_section = TRUE;
4837
4838 if ((s->flags & SEC_LINKER_CREATED) == 0)
4839 continue;
4840
4841 if (s == htab->plt
4842 || s == htab->glink
4843 || s == htab->got
4844 || s == htab->sgotplt
4845 || s == htab->sbss
4846 || s == htab->dynbss
4847 || s == htab->dynsbss)
4848 {
4849 /* We'd like to strip these sections if they aren't needed, but if
4850 we've exported dynamic symbols from them we must leave them.
4851 It's too late to tell BFD to get rid of the symbols. */
4852 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4853 strip_section = FALSE;
4854 /* Strip this section if we don't need it; see the
4855 comment below. */
4856 }
4857 else if (s == htab->sdata[0].section
4858 || s == htab->sdata[1].section)
4859 {
4860 /* Strip these too. */
4861 }
4862 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4863 {
4864 if (s->size != 0)
4865 {
4866 /* Remember whether there are any relocation sections. */
4867 relocs = TRUE;
4868
4869 /* We use the reloc_count field as a counter if we need
4870 to copy relocs into the output file. */
4871 s->reloc_count = 0;
4872 }
4873 }
4874 else
4875 {
4876 /* It's not one of our sections, so don't allocate space. */
4877 continue;
4878 }
4879
4880 if (s->size == 0 && strip_section)
4881 {
4882 /* If we don't need this section, strip it from the
4883 output file. This is mostly to handle .rela.bss and
4884 .rela.plt. We must create both sections in
4885 create_dynamic_sections, because they must be created
4886 before the linker maps input sections to output
4887 sections. The linker does that before
4888 adjust_dynamic_symbol is called, and it is that
4889 function which decides whether anything needs to go
4890 into these sections. */
4891 s->flags |= SEC_EXCLUDE;
4892 continue;
4893 }
4894
4895 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4896 continue;
4897
4898 /* Allocate memory for the section contents. */
4899 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4900 if (s->contents == NULL)
4901 return FALSE;
4902 }
4903
4904 if (htab->elf.dynamic_sections_created)
4905 {
4906 /* Add some entries to the .dynamic section. We fill in the
4907 values later, in ppc_elf_finish_dynamic_sections, but we
4908 must add the entries now so that we get the correct size for
4909 the .dynamic section. The DT_DEBUG entry is filled in by the
4910 dynamic linker and used by the debugger. */
4911 #define add_dynamic_entry(TAG, VAL) \
4912 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4913
4914 if (info->executable)
4915 {
4916 if (!add_dynamic_entry (DT_DEBUG, 0))
4917 return FALSE;
4918 }
4919
4920 if (htab->plt != NULL && htab->plt->size != 0)
4921 {
4922 if (!add_dynamic_entry (DT_PLTGOT, 0)
4923 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4924 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4925 || !add_dynamic_entry (DT_JMPREL, 0))
4926 return FALSE;
4927 }
4928
4929 if (htab->glink != NULL && htab->glink->size != 0)
4930 {
4931 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4932 return FALSE;
4933 }
4934
4935 if (relocs)
4936 {
4937 if (!add_dynamic_entry (DT_RELA, 0)
4938 || !add_dynamic_entry (DT_RELASZ, 0)
4939 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4940 return FALSE;
4941 }
4942
4943 /* If any dynamic relocs apply to a read-only section, then we
4944 need a DT_TEXTREL entry. */
4945 if ((info->flags & DF_TEXTREL) == 0)
4946 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4947 info);
4948
4949 if ((info->flags & DF_TEXTREL) != 0)
4950 {
4951 if (!add_dynamic_entry (DT_TEXTREL, 0))
4952 return FALSE;
4953 }
4954 }
4955 #undef add_dynamic_entry
4956
4957 return TRUE;
4958 }
4959 \f
4960 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4961
4962 static const int shared_stub_entry[] =
4963 {
4964 0x7c0802a6, /* mflr 0 */
4965 0x429f0005, /* bcl 20, 31, .Lxxx */
4966 0x7d6802a6, /* mflr 11 */
4967 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4968 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4969 0x7c0803a6, /* mtlr 0 */
4970 0x7d6903a6, /* mtctr 11 */
4971 0x4e800420, /* bctr */
4972 };
4973
4974 static const int stub_entry[] =
4975 {
4976 0x3d600000, /* lis 11,xxx@ha */
4977 0x396b0000, /* addi 11,11,xxx@l */
4978 0x7d6903a6, /* mtctr 11 */
4979 0x4e800420, /* bctr */
4980 };
4981
4982 static bfd_boolean
4983 ppc_elf_relax_section (bfd *abfd,
4984 asection *isec,
4985 struct bfd_link_info *link_info,
4986 bfd_boolean *again)
4987 {
4988 struct one_fixup
4989 {
4990 struct one_fixup *next;
4991 asection *tsec;
4992 bfd_vma toff;
4993 bfd_vma trampoff;
4994 };
4995
4996 Elf_Internal_Shdr *symtab_hdr;
4997 bfd_byte *contents = NULL;
4998 Elf_Internal_Sym *isymbuf = NULL;
4999 Elf_Internal_Rela *internal_relocs = NULL;
5000 Elf_Internal_Rela *irel, *irelend;
5001 struct one_fixup *fixups = NULL;
5002 bfd_boolean changed;
5003 struct ppc_elf_link_hash_table *htab;
5004 bfd_size_type trampoff;
5005 asection *got2;
5006
5007 *again = FALSE;
5008
5009 /* Nothing to do if there are no relocations, and no need to do
5010 anything with non-alloc sections. */
5011 if ((isec->flags & SEC_ALLOC) == 0
5012 || (isec->flags & SEC_RELOC) == 0
5013 || isec->reloc_count == 0)
5014 return TRUE;
5015
5016 trampoff = (isec->size + 3) & (bfd_vma) -4;
5017 /* Space for a branch around any trampolines. */
5018 trampoff += 4;
5019
5020 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5021
5022 /* Get a copy of the native relocations. */
5023 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5024 link_info->keep_memory);
5025 if (internal_relocs == NULL)
5026 goto error_return;
5027
5028 htab = ppc_elf_hash_table (link_info);
5029 got2 = bfd_get_section_by_name (abfd, ".got2");
5030
5031 irelend = internal_relocs + isec->reloc_count;
5032 for (irel = internal_relocs; irel < irelend; irel++)
5033 {
5034 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5035 bfd_vma symaddr, reladdr, toff, roff;
5036 asection *tsec;
5037 struct one_fixup *f;
5038 size_t insn_offset = 0;
5039 bfd_vma max_branch_offset, val;
5040 bfd_byte *hit_addr;
5041 unsigned long t0;
5042 unsigned char sym_type;
5043
5044 switch (r_type)
5045 {
5046 case R_PPC_REL24:
5047 case R_PPC_LOCAL24PC:
5048 case R_PPC_PLTREL24:
5049 max_branch_offset = 1 << 25;
5050 break;
5051
5052 case R_PPC_REL14:
5053 case R_PPC_REL14_BRTAKEN:
5054 case R_PPC_REL14_BRNTAKEN:
5055 max_branch_offset = 1 << 15;
5056 break;
5057
5058 default:
5059 continue;
5060 }
5061
5062 /* Get the value of the symbol referred to by the reloc. */
5063 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5064 {
5065 /* A local symbol. */
5066 Elf_Internal_Sym *isym;
5067
5068 /* Read this BFD's local symbols. */
5069 if (isymbuf == NULL)
5070 {
5071 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5072 if (isymbuf == NULL)
5073 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5074 symtab_hdr->sh_info, 0,
5075 NULL, NULL, NULL);
5076 if (isymbuf == 0)
5077 goto error_return;
5078 }
5079 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5080 if (isym->st_shndx == SHN_UNDEF)
5081 continue; /* We can't do anything with undefined symbols. */
5082 else if (isym->st_shndx == SHN_ABS)
5083 tsec = bfd_abs_section_ptr;
5084 else if (isym->st_shndx == SHN_COMMON)
5085 tsec = bfd_com_section_ptr;
5086 else
5087 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5088
5089 toff = isym->st_value;
5090 sym_type = ELF_ST_TYPE (isym->st_info);
5091 }
5092 else
5093 {
5094 /* Global symbol handling. */
5095 unsigned long indx;
5096 struct elf_link_hash_entry *h;
5097
5098 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5099 h = elf_sym_hashes (abfd)[indx];
5100
5101 while (h->root.type == bfd_link_hash_indirect
5102 || h->root.type == bfd_link_hash_warning)
5103 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5104
5105 tsec = NULL;
5106 toff = 0;
5107 if (r_type == R_PPC_PLTREL24
5108 && htab->plt != NULL)
5109 {
5110 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5111
5112 if (ent != NULL)
5113 {
5114 if (htab->plt_type == PLT_NEW)
5115 {
5116 tsec = htab->glink;
5117 toff = ent->glink_offset;
5118 }
5119 else
5120 {
5121 tsec = htab->plt;
5122 toff = ent->plt.offset;
5123 }
5124 }
5125 }
5126 if (tsec != NULL)
5127 ;
5128 else if (h->root.type == bfd_link_hash_defined
5129 || h->root.type == bfd_link_hash_defweak)
5130 {
5131 tsec = h->root.u.def.section;
5132 toff = h->root.u.def.value;
5133 }
5134 else
5135 continue;
5136
5137 sym_type = h->type;
5138 }
5139
5140 /* If the branch and target are in the same section, you have
5141 no hope of adding stubs. We'll error out later should the
5142 branch overflow. */
5143 if (tsec == isec)
5144 continue;
5145
5146 /* There probably isn't any reason to handle symbols in
5147 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5148 attribute for a code section, and we are only looking at
5149 branches. However, implement it correctly here as a
5150 reference for other target relax_section functions. */
5151 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5152 {
5153 /* At this stage in linking, no SEC_MERGE symbol has been
5154 adjusted, so all references to such symbols need to be
5155 passed through _bfd_merged_section_offset. (Later, in
5156 relocate_section, all SEC_MERGE symbols *except* for
5157 section symbols have been adjusted.)
5158
5159 gas may reduce relocations against symbols in SEC_MERGE
5160 sections to a relocation against the section symbol when
5161 the original addend was zero. When the reloc is against
5162 a section symbol we should include the addend in the
5163 offset passed to _bfd_merged_section_offset, since the
5164 location of interest is the original symbol. On the
5165 other hand, an access to "sym+addend" where "sym" is not
5166 a section symbol should not include the addend; Such an
5167 access is presumed to be an offset from "sym"; The
5168 location of interest is just "sym". */
5169 if (sym_type == STT_SECTION)
5170 toff += irel->r_addend;
5171
5172 toff = _bfd_merged_section_offset (abfd, &tsec,
5173 elf_section_data (tsec)->sec_info,
5174 toff);
5175
5176 if (sym_type != STT_SECTION)
5177 toff += irel->r_addend;
5178 }
5179 /* PLTREL24 addends are special. */
5180 else if (r_type != R_PPC_PLTREL24)
5181 toff += irel->r_addend;
5182
5183 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5184
5185 roff = irel->r_offset;
5186 reladdr = isec->output_section->vma + isec->output_offset + roff;
5187
5188 /* If the branch is in range, no need to do anything. */
5189 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5190 continue;
5191
5192 /* Look for an existing fixup to this address. */
5193 for (f = fixups; f ; f = f->next)
5194 if (f->tsec == tsec && f->toff == toff)
5195 break;
5196
5197 if (f == NULL)
5198 {
5199 size_t size;
5200 unsigned long stub_rtype;
5201
5202 val = trampoff - roff;
5203 if (val >= max_branch_offset)
5204 /* Oh dear, we can't reach a trampoline. Don't try to add
5205 one. We'll report an error later. */
5206 continue;
5207
5208 if (link_info->shared)
5209 {
5210 size = 4 * ARRAY_SIZE (shared_stub_entry);
5211 insn_offset = 12;
5212 stub_rtype = R_PPC_RELAX32PC;
5213 }
5214 else
5215 {
5216 size = 4 * ARRAY_SIZE (stub_entry);
5217 insn_offset = 0;
5218 stub_rtype = R_PPC_RELAX32;
5219 }
5220
5221 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5222 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5223 abort ();
5224 if (tsec == htab->plt
5225 || tsec == htab->glink)
5226 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5227
5228 /* Hijack the old relocation. Since we need two
5229 relocations for this use a "composite" reloc. */
5230 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5231 stub_rtype);
5232 irel->r_offset = trampoff + insn_offset;
5233
5234 /* Record the fixup so we don't do it again this section. */
5235 f = bfd_malloc (sizeof (*f));
5236 f->next = fixups;
5237 f->tsec = tsec;
5238 f->toff = toff;
5239 f->trampoff = trampoff;
5240 fixups = f;
5241
5242 trampoff += size;
5243 }
5244 else
5245 {
5246 val = f->trampoff - roff;
5247 if (val >= max_branch_offset)
5248 continue;
5249
5250 /* Nop out the reloc, since we're finalizing things here. */
5251 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5252 }
5253
5254 /* Get the section contents. */
5255 if (contents == NULL)
5256 {
5257 /* Get cached copy if it exists. */
5258 if (elf_section_data (isec)->this_hdr.contents != NULL)
5259 contents = elf_section_data (isec)->this_hdr.contents;
5260 else
5261 {
5262 /* Go get them off disk. */
5263 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5264 goto error_return;
5265 }
5266 }
5267
5268 /* Fix up the existing branch to hit the trampoline. */
5269 hit_addr = contents + roff;
5270 switch (r_type)
5271 {
5272 case R_PPC_REL24:
5273 case R_PPC_LOCAL24PC:
5274 case R_PPC_PLTREL24:
5275 t0 = bfd_get_32 (abfd, hit_addr);
5276 t0 &= ~0x3fffffc;
5277 t0 |= val & 0x3fffffc;
5278 bfd_put_32 (abfd, t0, hit_addr);
5279 break;
5280
5281 case R_PPC_REL14:
5282 case R_PPC_REL14_BRTAKEN:
5283 case R_PPC_REL14_BRNTAKEN:
5284 t0 = bfd_get_32 (abfd, hit_addr);
5285 t0 &= ~0xfffc;
5286 t0 |= val & 0xfffc;
5287 bfd_put_32 (abfd, t0, hit_addr);
5288 break;
5289 }
5290 }
5291
5292 /* Write out the trampolines. */
5293 changed = fixups != NULL;
5294 if (fixups != NULL)
5295 {
5296 const int *stub;
5297 bfd_byte *dest;
5298 bfd_vma val;
5299 int i, size;
5300
5301 do
5302 {
5303 struct one_fixup *f = fixups;
5304 fixups = fixups->next;
5305 free (f);
5306 }
5307 while (fixups);
5308
5309 contents = bfd_realloc (contents, trampoff);
5310 if (contents == NULL)
5311 goto error_return;
5312
5313 isec->size = (isec->size + 3) & (bfd_vma) -4;
5314 /* Branch around the trampolines. */
5315 val = trampoff - isec->size + 0x48000000;
5316 dest = contents + isec->size;
5317 isec->size = trampoff;
5318 bfd_put_32 (abfd, val, dest);
5319 dest += 4;
5320
5321 if (link_info->shared)
5322 {
5323 stub = shared_stub_entry;
5324 size = ARRAY_SIZE (shared_stub_entry);
5325 }
5326 else
5327 {
5328 stub = stub_entry;
5329 size = ARRAY_SIZE (stub_entry);
5330 }
5331
5332 i = 0;
5333 while (dest < contents + trampoff)
5334 {
5335 bfd_put_32 (abfd, stub[i], dest);
5336 i++;
5337 if (i == size)
5338 i = 0;
5339 dest += 4;
5340 }
5341 BFD_ASSERT (i == 0);
5342 }
5343
5344 if (isymbuf != NULL
5345 && symtab_hdr->contents != (unsigned char *) isymbuf)
5346 {
5347 if (! link_info->keep_memory)
5348 free (isymbuf);
5349 else
5350 {
5351 /* Cache the symbols for elf_link_input_bfd. */
5352 symtab_hdr->contents = (unsigned char *) isymbuf;
5353 }
5354 }
5355
5356 if (contents != NULL
5357 && elf_section_data (isec)->this_hdr.contents != contents)
5358 {
5359 if (!changed && !link_info->keep_memory)
5360 free (contents);
5361 else
5362 {
5363 /* Cache the section contents for elf_link_input_bfd. */
5364 elf_section_data (isec)->this_hdr.contents = contents;
5365 }
5366 }
5367
5368 if (elf_section_data (isec)->relocs != internal_relocs)
5369 {
5370 if (!changed)
5371 free (internal_relocs);
5372 else
5373 elf_section_data (isec)->relocs = internal_relocs;
5374 }
5375
5376 *again = changed;
5377 return TRUE;
5378
5379 error_return:
5380 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5381 free (isymbuf);
5382 if (contents != NULL
5383 && elf_section_data (isec)->this_hdr.contents != contents)
5384 free (contents);
5385 if (internal_relocs != NULL
5386 && elf_section_data (isec)->relocs != internal_relocs)
5387 free (internal_relocs);
5388 return FALSE;
5389 }
5390 \f
5391 /* What to do when ld finds relocations against symbols defined in
5392 discarded sections. */
5393
5394 static unsigned int
5395 ppc_elf_action_discarded (asection *sec)
5396 {
5397 if (strcmp (".fixup", sec->name) == 0)
5398 return 0;
5399
5400 if (strcmp (".got2", sec->name) == 0)
5401 return 0;
5402
5403 return _bfd_elf_default_action_discarded (sec);
5404 }
5405 \f
5406 /* Fill in the address for a pointer generated in a linker section. */
5407
5408 static bfd_vma
5409 elf_finish_pointer_linker_section (bfd *input_bfd,
5410 elf_linker_section_t *lsect,
5411 struct elf_link_hash_entry *h,
5412 bfd_vma relocation,
5413 const Elf_Internal_Rela *rel)
5414 {
5415 elf_linker_section_pointers_t *linker_section_ptr;
5416
5417 BFD_ASSERT (lsect != NULL);
5418
5419 if (h != NULL)
5420 {
5421 /* Handle global symbol. */
5422 struct ppc_elf_link_hash_entry *eh;
5423
5424 eh = (struct ppc_elf_link_hash_entry *) h;
5425 BFD_ASSERT (eh->elf.def_regular);
5426 linker_section_ptr = eh->linker_section_pointer;
5427 }
5428 else
5429 {
5430 /* Handle local symbol. */
5431 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5432
5433 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5434 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5435 }
5436
5437 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5438 rel->r_addend,
5439 lsect);
5440 BFD_ASSERT (linker_section_ptr != NULL);
5441
5442 /* Offset will always be a multiple of four, so use the bottom bit
5443 as a "written" flag. */
5444 if ((linker_section_ptr->offset & 1) == 0)
5445 {
5446 bfd_put_32 (lsect->section->owner,
5447 relocation + linker_section_ptr->addend,
5448 lsect->section->contents + linker_section_ptr->offset);
5449 linker_section_ptr->offset += 1;
5450 }
5451
5452 relocation = (lsect->section->output_offset
5453 + linker_section_ptr->offset - 1
5454 - 0x8000);
5455
5456 #ifdef DEBUG
5457 fprintf (stderr,
5458 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5459 lsect->name, (long) relocation, (long) relocation);
5460 #endif
5461
5462 /* Subtract out the addend, because it will get added back in by the normal
5463 processing. */
5464 return relocation - linker_section_ptr->addend;
5465 }
5466
5467 /* The RELOCATE_SECTION function is called by the ELF backend linker
5468 to handle the relocations for a section.
5469
5470 The relocs are always passed as Rela structures; if the section
5471 actually uses Rel structures, the r_addend field will always be
5472 zero.
5473
5474 This function is responsible for adjust the section contents as
5475 necessary, and (if using Rela relocs and generating a
5476 relocatable output file) adjusting the reloc addend as
5477 necessary.
5478
5479 This function does not have to worry about setting the reloc
5480 address or the reloc symbol index.
5481
5482 LOCAL_SYMS is a pointer to the swapped in local symbols.
5483
5484 LOCAL_SECTIONS is an array giving the section in the input file
5485 corresponding to the st_shndx field of each local symbol.
5486
5487 The global hash table entry for the global symbols can be found
5488 via elf_sym_hashes (input_bfd).
5489
5490 When generating relocatable output, this function must handle
5491 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5492 going to be the section symbol corresponding to the output
5493 section, which means that the addend must be adjusted
5494 accordingly. */
5495
5496 static bfd_boolean
5497 ppc_elf_relocate_section (bfd *output_bfd,
5498 struct bfd_link_info *info,
5499 bfd *input_bfd,
5500 asection *input_section,
5501 bfd_byte *contents,
5502 Elf_Internal_Rela *relocs,
5503 Elf_Internal_Sym *local_syms,
5504 asection **local_sections)
5505 {
5506 Elf_Internal_Shdr *symtab_hdr;
5507 struct elf_link_hash_entry **sym_hashes;
5508 struct ppc_elf_link_hash_table *htab;
5509 Elf_Internal_Rela *rel;
5510 Elf_Internal_Rela *relend;
5511 Elf_Internal_Rela outrel;
5512 bfd_byte *loc;
5513 asection *got2, *sreloc = NULL;
5514 bfd_vma *local_got_offsets;
5515 bfd_boolean ret = TRUE;
5516
5517 #ifdef DEBUG
5518 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5519 "%ld relocations%s",
5520 input_bfd, input_section,
5521 (long) input_section->reloc_count,
5522 (info->relocatable) ? " (relocatable)" : "");
5523 #endif
5524
5525 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5526
5527 if (info->relocatable)
5528 {
5529 if (got2 == NULL)
5530 return TRUE;
5531
5532 rel = relocs;
5533 relend = relocs + input_section->reloc_count;
5534 for (; rel < relend; rel++)
5535 {
5536 enum elf_ppc_reloc_type r_type;
5537
5538 r_type = ELF32_R_TYPE (rel->r_info);
5539 if (r_type == R_PPC_PLTREL24
5540 && rel->r_addend >= 32768)
5541 {
5542 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5543 addend specifies the GOT pointer offset within .got2. */
5544 rel->r_addend += got2->output_offset;
5545 }
5546 }
5547 return TRUE;
5548 }
5549
5550 /* Initialize howto table if not already done. */
5551 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5552 ppc_elf_howto_init ();
5553
5554 htab = ppc_elf_hash_table (info);
5555 local_got_offsets = elf_local_got_offsets (input_bfd);
5556 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5557 sym_hashes = elf_sym_hashes (input_bfd);
5558 rel = relocs;
5559 relend = relocs + input_section->reloc_count;
5560 for (; rel < relend; rel++)
5561 {
5562 enum elf_ppc_reloc_type r_type;
5563 bfd_vma addend;
5564 bfd_reloc_status_type r;
5565 Elf_Internal_Sym *sym;
5566 asection *sec;
5567 struct elf_link_hash_entry *h;
5568 const char *sym_name;
5569 reloc_howto_type *howto;
5570 unsigned long r_symndx;
5571 bfd_vma relocation;
5572 bfd_vma branch_bit, insn, from;
5573 bfd_boolean unresolved_reloc;
5574 bfd_boolean warned;
5575 unsigned int tls_type, tls_mask, tls_gd;
5576
5577 r_type = ELF32_R_TYPE (rel->r_info);
5578 sym = NULL;
5579 sec = NULL;
5580 h = NULL;
5581 unresolved_reloc = FALSE;
5582 warned = FALSE;
5583 r_symndx = ELF32_R_SYM (rel->r_info);
5584
5585 if (r_symndx < symtab_hdr->sh_info)
5586 {
5587 sym = local_syms + r_symndx;
5588 sec = local_sections[r_symndx];
5589 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5590
5591 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5592 }
5593 else
5594 {
5595 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5596 r_symndx, symtab_hdr, sym_hashes,
5597 h, sec, relocation,
5598 unresolved_reloc, warned);
5599
5600 sym_name = h->root.root.string;
5601 }
5602
5603 /* TLS optimizations. Replace instruction sequences and relocs
5604 based on information we collected in tls_optimize. We edit
5605 RELOCS so that --emit-relocs will output something sensible
5606 for the final instruction stream. */
5607 tls_mask = 0;
5608 tls_gd = 0;
5609 if (IS_PPC_TLS_RELOC (r_type))
5610 {
5611 if (h != NULL)
5612 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5613 else if (local_got_offsets != NULL)
5614 {
5615 char *lgot_masks;
5616 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5617 tls_mask = lgot_masks[r_symndx];
5618 }
5619 }
5620
5621 /* Ensure reloc mapping code below stays sane. */
5622 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5623 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5624 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5625 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5626 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5627 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5628 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5629 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5630 abort ();
5631 switch (r_type)
5632 {
5633 default:
5634 break;
5635
5636 case R_PPC_GOT_TPREL16:
5637 case R_PPC_GOT_TPREL16_LO:
5638 if (tls_mask != 0
5639 && (tls_mask & TLS_TPREL) == 0)
5640 {
5641 bfd_vma insn;
5642 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5643 insn &= 31 << 21;
5644 insn |= 0x3c020000; /* addis 0,2,0 */
5645 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5646 r_type = R_PPC_TPREL16_HA;
5647 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5648 }
5649 break;
5650
5651 case R_PPC_TLS:
5652 if (tls_mask != 0
5653 && (tls_mask & TLS_TPREL) == 0)
5654 {
5655 bfd_vma insn, rtra;
5656 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5657 if ((insn & ((31 << 26) | (31 << 11)))
5658 == ((31 << 26) | (2 << 11)))
5659 rtra = insn & ((1 << 26) - (1 << 16));
5660 else if ((insn & ((31 << 26) | (31 << 16)))
5661 == ((31 << 26) | (2 << 16)))
5662 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5663 else
5664 abort ();
5665 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5666 /* add -> addi. */
5667 insn = 14 << 26;
5668 else if ((insn & (31 << 1)) == 23 << 1
5669 && ((insn & (31 << 6)) < 14 << 6
5670 || ((insn & (31 << 6)) >= 16 << 6
5671 && (insn & (31 << 6)) < 24 << 6)))
5672 /* load and store indexed -> dform. */
5673 insn = (32 | ((insn >> 6) & 31)) << 26;
5674 else if ((insn & (31 << 1)) == 21 << 1
5675 && (insn & (0x1a << 6)) == 0)
5676 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5677 insn = (((58 | ((insn >> 6) & 4)) << 26)
5678 | ((insn >> 6) & 1));
5679 else if ((insn & (31 << 1)) == 21 << 1
5680 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5681 /* lwax -> lwa. */
5682 insn = (58 << 26) | 2;
5683 else
5684 abort ();
5685 insn |= rtra;
5686 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5687 r_type = R_PPC_TPREL16_LO;
5688 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5689 /* Was PPC_TLS which sits on insn boundary, now
5690 PPC_TPREL16_LO which is at insn+2. */
5691 rel->r_offset += 2;
5692 }
5693 break;
5694
5695 case R_PPC_GOT_TLSGD16_HI:
5696 case R_PPC_GOT_TLSGD16_HA:
5697 tls_gd = TLS_TPRELGD;
5698 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5699 goto tls_gdld_hi;
5700 break;
5701
5702 case R_PPC_GOT_TLSLD16_HI:
5703 case R_PPC_GOT_TLSLD16_HA:
5704 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5705 {
5706 tls_gdld_hi:
5707 if ((tls_mask & tls_gd) != 0)
5708 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5709 + R_PPC_GOT_TPREL16);
5710 else
5711 {
5712 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5713 rel->r_offset -= 2;
5714 r_type = R_PPC_NONE;
5715 }
5716 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5717 }
5718 break;
5719
5720 case R_PPC_GOT_TLSGD16:
5721 case R_PPC_GOT_TLSGD16_LO:
5722 tls_gd = TLS_TPRELGD;
5723 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5724 goto tls_get_addr_check;
5725 break;
5726
5727 case R_PPC_GOT_TLSLD16:
5728 case R_PPC_GOT_TLSLD16_LO:
5729 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5730 {
5731 tls_get_addr_check:
5732 if (rel + 1 < relend)
5733 {
5734 enum elf_ppc_reloc_type r_type2;
5735 unsigned long r_symndx2;
5736 struct elf_link_hash_entry *h2;
5737 bfd_vma insn1, insn2;
5738 bfd_vma offset;
5739
5740 /* The next instruction should be a call to
5741 __tls_get_addr. Peek at the reloc to be sure. */
5742 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5743 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5744 if (r_symndx2 < symtab_hdr->sh_info
5745 || (r_type2 != R_PPC_REL14
5746 && r_type2 != R_PPC_REL14_BRTAKEN
5747 && r_type2 != R_PPC_REL14_BRNTAKEN
5748 && r_type2 != R_PPC_REL24
5749 && r_type2 != R_PPC_PLTREL24))
5750 break;
5751
5752 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5753 while (h2->root.type == bfd_link_hash_indirect
5754 || h2->root.type == bfd_link_hash_warning)
5755 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5756 if (h2 == NULL || h2 != htab->tls_get_addr)
5757 break;
5758
5759 /* OK, it checks out. Replace the call. */
5760 offset = rel[1].r_offset;
5761 insn1 = bfd_get_32 (output_bfd,
5762 contents + rel->r_offset - 2);
5763 if ((tls_mask & tls_gd) != 0)
5764 {
5765 /* IE */
5766 insn1 &= (1 << 26) - 1;
5767 insn1 |= 32 << 26; /* lwz */
5768 insn2 = 0x7c631214; /* add 3,3,2 */
5769 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5770 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5771 + R_PPC_GOT_TPREL16);
5772 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5773 }
5774 else
5775 {
5776 /* LE */
5777 insn1 = 0x3c620000; /* addis 3,2,0 */
5778 insn2 = 0x38630000; /* addi 3,3,0 */
5779 if (tls_gd == 0)
5780 {
5781 /* Was an LD reloc. */
5782 r_symndx = 0;
5783 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5784 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5785 }
5786 r_type = R_PPC_TPREL16_HA;
5787 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5788 rel[1].r_info = ELF32_R_INFO (r_symndx,
5789 R_PPC_TPREL16_LO);
5790 rel[1].r_offset += 2;
5791 }
5792 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5793 bfd_put_32 (output_bfd, insn2, contents + offset);
5794 if (tls_gd == 0)
5795 {
5796 /* We changed the symbol on an LD reloc. Start over
5797 in order to get h, sym, sec etc. right. */
5798 rel--;
5799 continue;
5800 }
5801 }
5802 }
5803 break;
5804 }
5805
5806 /* Handle other relocations that tweak non-addend part of insn. */
5807 branch_bit = 0;
5808 switch (r_type)
5809 {
5810 default:
5811 break;
5812
5813 /* Branch taken prediction relocations. */
5814 case R_PPC_ADDR14_BRTAKEN:
5815 case R_PPC_REL14_BRTAKEN:
5816 branch_bit = BRANCH_PREDICT_BIT;
5817 /* Fall thru */
5818
5819 /* Branch not taken prediction relocations. */
5820 case R_PPC_ADDR14_BRNTAKEN:
5821 case R_PPC_REL14_BRNTAKEN:
5822 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5823 insn &= ~BRANCH_PREDICT_BIT;
5824 insn |= branch_bit;
5825
5826 from = (rel->r_offset
5827 + input_section->output_offset
5828 + input_section->output_section->vma);
5829
5830 /* Invert 'y' bit if not the default. */
5831 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5832 insn ^= BRANCH_PREDICT_BIT;
5833
5834 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5835 break;
5836 }
5837
5838 addend = rel->r_addend;
5839 tls_type = 0;
5840 howto = NULL;
5841 if (r_type < R_PPC_max)
5842 howto = ppc_elf_howto_table[r_type];
5843 switch (r_type)
5844 {
5845 default:
5846 (*_bfd_error_handler)
5847 (_("%B: unknown relocation type %d for symbol %s"),
5848 input_bfd, (int) r_type, sym_name);
5849
5850 bfd_set_error (bfd_error_bad_value);
5851 ret = FALSE;
5852 continue;
5853
5854 case R_PPC_NONE:
5855 case R_PPC_TLS:
5856 case R_PPC_EMB_MRKREF:
5857 case R_PPC_GNU_VTINHERIT:
5858 case R_PPC_GNU_VTENTRY:
5859 continue;
5860
5861 /* GOT16 relocations. Like an ADDR16 using the symbol's
5862 address in the GOT as relocation value instead of the
5863 symbol's value itself. Also, create a GOT entry for the
5864 symbol and put the symbol value there. */
5865 case R_PPC_GOT_TLSGD16:
5866 case R_PPC_GOT_TLSGD16_LO:
5867 case R_PPC_GOT_TLSGD16_HI:
5868 case R_PPC_GOT_TLSGD16_HA:
5869 tls_type = TLS_TLS | TLS_GD;
5870 goto dogot;
5871
5872 case R_PPC_GOT_TLSLD16:
5873 case R_PPC_GOT_TLSLD16_LO:
5874 case R_PPC_GOT_TLSLD16_HI:
5875 case R_PPC_GOT_TLSLD16_HA:
5876 tls_type = TLS_TLS | TLS_LD;
5877 goto dogot;
5878
5879 case R_PPC_GOT_TPREL16:
5880 case R_PPC_GOT_TPREL16_LO:
5881 case R_PPC_GOT_TPREL16_HI:
5882 case R_PPC_GOT_TPREL16_HA:
5883 tls_type = TLS_TLS | TLS_TPREL;
5884 goto dogot;
5885
5886 case R_PPC_GOT_DTPREL16:
5887 case R_PPC_GOT_DTPREL16_LO:
5888 case R_PPC_GOT_DTPREL16_HI:
5889 case R_PPC_GOT_DTPREL16_HA:
5890 tls_type = TLS_TLS | TLS_DTPREL;
5891 goto dogot;
5892
5893 case R_PPC_GOT16:
5894 case R_PPC_GOT16_LO:
5895 case R_PPC_GOT16_HI:
5896 case R_PPC_GOT16_HA:
5897 dogot:
5898 {
5899 /* Relocation is to the entry for this symbol in the global
5900 offset table. */
5901 bfd_vma off;
5902 bfd_vma *offp;
5903 unsigned long indx;
5904
5905 if (htab->got == NULL)
5906 abort ();
5907
5908 indx = 0;
5909 if (tls_type == (TLS_TLS | TLS_LD)
5910 && (h == NULL
5911 || !h->def_dynamic))
5912 offp = &htab->tlsld_got.offset;
5913 else if (h != NULL)
5914 {
5915 bfd_boolean dyn;
5916 dyn = htab->elf.dynamic_sections_created;
5917 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5918 || (info->shared
5919 && SYMBOL_REFERENCES_LOCAL (info, h)))
5920 /* This is actually a static link, or it is a
5921 -Bsymbolic link and the symbol is defined
5922 locally, or the symbol was forced to be local
5923 because of a version file. */
5924 ;
5925 else
5926 {
5927 indx = h->dynindx;
5928 unresolved_reloc = FALSE;
5929 }
5930 offp = &h->got.offset;
5931 }
5932 else
5933 {
5934 if (local_got_offsets == NULL)
5935 abort ();
5936 offp = &local_got_offsets[r_symndx];
5937 }
5938
5939 /* The offset must always be a multiple of 4. We use the
5940 least significant bit to record whether we have already
5941 processed this entry. */
5942 off = *offp;
5943 if ((off & 1) != 0)
5944 off &= ~1;
5945 else
5946 {
5947 unsigned int tls_m = (tls_mask
5948 & (TLS_LD | TLS_GD | TLS_DTPREL
5949 | TLS_TPREL | TLS_TPRELGD));
5950
5951 if (offp == &htab->tlsld_got.offset)
5952 tls_m = TLS_LD;
5953 else if (h == NULL
5954 || !h->def_dynamic)
5955 tls_m &= ~TLS_LD;
5956
5957 /* We might have multiple got entries for this sym.
5958 Initialize them all. */
5959 do
5960 {
5961 int tls_ty = 0;
5962
5963 if ((tls_m & TLS_LD) != 0)
5964 {
5965 tls_ty = TLS_TLS | TLS_LD;
5966 tls_m &= ~TLS_LD;
5967 }
5968 else if ((tls_m & TLS_GD) != 0)
5969 {
5970 tls_ty = TLS_TLS | TLS_GD;
5971 tls_m &= ~TLS_GD;
5972 }
5973 else if ((tls_m & TLS_DTPREL) != 0)
5974 {
5975 tls_ty = TLS_TLS | TLS_DTPREL;
5976 tls_m &= ~TLS_DTPREL;
5977 }
5978 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5979 {
5980 tls_ty = TLS_TLS | TLS_TPREL;
5981 tls_m = 0;
5982 }
5983
5984 /* Generate relocs for the dynamic linker. */
5985 if ((info->shared || indx != 0)
5986 && (h == NULL
5987 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5988 || h->root.type != bfd_link_hash_undefweak))
5989 {
5990 outrel.r_offset = (htab->got->output_section->vma
5991 + htab->got->output_offset
5992 + off);
5993 outrel.r_addend = 0;
5994 if (tls_ty & (TLS_LD | TLS_GD))
5995 {
5996 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5997 if (tls_ty == (TLS_TLS | TLS_GD))
5998 {
5999 loc = htab->relgot->contents;
6000 loc += (htab->relgot->reloc_count++
6001 * sizeof (Elf32_External_Rela));
6002 bfd_elf32_swap_reloca_out (output_bfd,
6003 &outrel, loc);
6004 outrel.r_offset += 4;
6005 outrel.r_info
6006 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6007 }
6008 }
6009 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6010 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6011 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6012 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6013 else if (indx == 0)
6014 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6015 else
6016 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6017 if (indx == 0)
6018 {
6019 outrel.r_addend += relocation;
6020 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6021 outrel.r_addend -= htab->elf.tls_sec->vma;
6022 }
6023 loc = htab->relgot->contents;
6024 loc += (htab->relgot->reloc_count++
6025 * sizeof (Elf32_External_Rela));
6026 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6027 }
6028
6029 /* Init the .got section contents if we're not
6030 emitting a reloc. */
6031 else
6032 {
6033 bfd_vma value = relocation;
6034
6035 if (tls_ty == (TLS_TLS | TLS_LD))
6036 value = 1;
6037 else if (tls_ty != 0)
6038 {
6039 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6040 if (tls_ty == (TLS_TLS | TLS_TPREL))
6041 value += DTP_OFFSET - TP_OFFSET;
6042
6043 if (tls_ty == (TLS_TLS | TLS_GD))
6044 {
6045 bfd_put_32 (output_bfd, value,
6046 htab->got->contents + off + 4);
6047 value = 1;
6048 }
6049 }
6050 bfd_put_32 (output_bfd, value,
6051 htab->got->contents + off);
6052 }
6053
6054 off += 4;
6055 if (tls_ty & (TLS_LD | TLS_GD))
6056 off += 4;
6057 }
6058 while (tls_m != 0);
6059
6060 off = *offp;
6061 *offp = off | 1;
6062 }
6063
6064 if (off >= (bfd_vma) -2)
6065 abort ();
6066
6067 if ((tls_type & TLS_TLS) != 0)
6068 {
6069 if (tls_type != (TLS_TLS | TLS_LD))
6070 {
6071 if ((tls_mask & TLS_LD) != 0
6072 && !(h == NULL
6073 || !h->def_dynamic))
6074 off += 8;
6075 if (tls_type != (TLS_TLS | TLS_GD))
6076 {
6077 if ((tls_mask & TLS_GD) != 0)
6078 off += 8;
6079 if (tls_type != (TLS_TLS | TLS_DTPREL))
6080 {
6081 if ((tls_mask & TLS_DTPREL) != 0)
6082 off += 4;
6083 }
6084 }
6085 }
6086 }
6087
6088 relocation = htab->got->output_offset + off;
6089 relocation -= htab->elf.hgot->root.u.def.value;
6090
6091 /* Addends on got relocations don't make much sense.
6092 x+off@got is actually x@got+off, and since the got is
6093 generated by a hash table traversal, the value in the
6094 got at entry m+n bears little relation to the entry m. */
6095 if (addend != 0)
6096 (*_bfd_error_handler)
6097 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6098 input_bfd,
6099 input_section,
6100 (long) rel->r_offset,
6101 howto->name,
6102 sym_name);
6103 }
6104 break;
6105
6106 /* Relocations that need no special processing. */
6107 case R_PPC_LOCAL24PC:
6108 /* It makes no sense to point a local relocation
6109 at a symbol not in this object. */
6110 if (unresolved_reloc)
6111 {
6112 if (! (*info->callbacks->undefined_symbol) (info,
6113 h->root.root.string,
6114 input_bfd,
6115 input_section,
6116 rel->r_offset,
6117 TRUE))
6118 return FALSE;
6119 continue;
6120 }
6121 break;
6122
6123 case R_PPC_DTPREL16:
6124 case R_PPC_DTPREL16_LO:
6125 case R_PPC_DTPREL16_HI:
6126 case R_PPC_DTPREL16_HA:
6127 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6128 break;
6129
6130 /* Relocations that may need to be propagated if this is a shared
6131 object. */
6132 case R_PPC_TPREL16:
6133 case R_PPC_TPREL16_LO:
6134 case R_PPC_TPREL16_HI:
6135 case R_PPC_TPREL16_HA:
6136 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6137 /* The TPREL16 relocs shouldn't really be used in shared
6138 libs as they will result in DT_TEXTREL being set, but
6139 support them anyway. */
6140 goto dodyn;
6141
6142 case R_PPC_TPREL32:
6143 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6144 goto dodyn;
6145
6146 case R_PPC_DTPREL32:
6147 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6148 goto dodyn;
6149
6150 case R_PPC_DTPMOD32:
6151 relocation = 1;
6152 addend = 0;
6153 goto dodyn;
6154
6155 case R_PPC_REL16:
6156 case R_PPC_REL16_LO:
6157 case R_PPC_REL16_HI:
6158 case R_PPC_REL16_HA:
6159 break;
6160
6161 case R_PPC_REL24:
6162 case R_PPC_REL32:
6163 case R_PPC_REL14:
6164 case R_PPC_REL14_BRTAKEN:
6165 case R_PPC_REL14_BRNTAKEN:
6166 /* If these relocations are not to a named symbol, they can be
6167 handled right here, no need to bother the dynamic linker. */
6168 if (SYMBOL_REFERENCES_LOCAL (info, h)
6169 || h == htab->elf.hgot)
6170 break;
6171 /* fall through */
6172
6173 /* Relocations that always need to be propagated if this is a shared
6174 object. */
6175 case R_PPC_ADDR32:
6176 case R_PPC_ADDR24:
6177 case R_PPC_ADDR16:
6178 case R_PPC_ADDR16_LO:
6179 case R_PPC_ADDR16_HI:
6180 case R_PPC_ADDR16_HA:
6181 case R_PPC_ADDR14:
6182 case R_PPC_ADDR14_BRTAKEN:
6183 case R_PPC_ADDR14_BRNTAKEN:
6184 case R_PPC_UADDR32:
6185 case R_PPC_UADDR16:
6186 /* r_symndx will be zero only for relocs against symbols
6187 from removed linkonce sections, or sections discarded by
6188 a linker script. */
6189 dodyn:
6190 if (r_symndx == 0)
6191 break;
6192 /* Fall thru. */
6193
6194 if ((input_section->flags & SEC_ALLOC) == 0)
6195 break;
6196 /* Fall thru. */
6197
6198 if ((info->shared
6199 && (h == NULL
6200 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6201 || h->root.type != bfd_link_hash_undefweak)
6202 && (MUST_BE_DYN_RELOC (r_type)
6203 || !SYMBOL_CALLS_LOCAL (info, h)))
6204 || (ELIMINATE_COPY_RELOCS
6205 && !info->shared
6206 && h != NULL
6207 && h->dynindx != -1
6208 && !h->non_got_ref
6209 && h->def_dynamic
6210 && !h->def_regular))
6211 {
6212 int skip;
6213
6214 #ifdef DEBUG
6215 fprintf (stderr, "ppc_elf_relocate_section needs to "
6216 "create relocation for %s\n",
6217 (h && h->root.root.string
6218 ? h->root.root.string : "<unknown>"));
6219 #endif
6220
6221 /* When generating a shared object, these relocations
6222 are copied into the output file to be resolved at run
6223 time. */
6224 if (sreloc == NULL)
6225 {
6226 const char *name;
6227
6228 name = (bfd_elf_string_from_elf_section
6229 (input_bfd,
6230 elf_elfheader (input_bfd)->e_shstrndx,
6231 elf_section_data (input_section)->rel_hdr.sh_name));
6232 if (name == NULL)
6233 return FALSE;
6234
6235 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6236 && strcmp (bfd_get_section_name (input_bfd,
6237 input_section),
6238 name + 5) == 0);
6239
6240 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6241 BFD_ASSERT (sreloc != NULL);
6242 }
6243
6244 skip = 0;
6245
6246 outrel.r_offset =
6247 _bfd_elf_section_offset (output_bfd, info, input_section,
6248 rel->r_offset);
6249 if (outrel.r_offset == (bfd_vma) -1
6250 || outrel.r_offset == (bfd_vma) -2)
6251 skip = (int) outrel.r_offset;
6252 outrel.r_offset += (input_section->output_section->vma
6253 + input_section->output_offset);
6254
6255 if (skip)
6256 memset (&outrel, 0, sizeof outrel);
6257 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6258 {
6259 unresolved_reloc = FALSE;
6260 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6261 outrel.r_addend = rel->r_addend;
6262 }
6263 else
6264 {
6265 outrel.r_addend = relocation + rel->r_addend;
6266
6267 if (r_type == R_PPC_ADDR32)
6268 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6269 else
6270 {
6271 long indx;
6272
6273 if (bfd_is_abs_section (sec))
6274 indx = 0;
6275 else if (sec == NULL || sec->owner == NULL)
6276 {
6277 bfd_set_error (bfd_error_bad_value);
6278 return FALSE;
6279 }
6280 else
6281 {
6282 asection *osec;
6283
6284 /* We are turning this relocation into one
6285 against a section symbol. It would be
6286 proper to subtract the symbol's value,
6287 osec->vma, from the emitted reloc addend,
6288 but ld.so expects buggy relocs. */
6289 osec = sec->output_section;
6290 indx = elf_section_data (osec)->dynindx;
6291 BFD_ASSERT (indx > 0);
6292 #ifdef DEBUG
6293 if (indx <= 0)
6294 printf ("indx=%d section=%s flags=%08x name=%s\n",
6295 indx, osec->name, osec->flags,
6296 h->root.root.string);
6297 #endif
6298 }
6299
6300 outrel.r_info = ELF32_R_INFO (indx, r_type);
6301 }
6302 }
6303
6304 loc = sreloc->contents;
6305 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6306 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6307
6308 if (skip == -1)
6309 continue;
6310
6311 /* This reloc will be computed at runtime. We clear the memory
6312 so that it contains predictable value. */
6313 if (! skip
6314 && ((input_section->flags & SEC_ALLOC) != 0
6315 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6316 {
6317 relocation = howto->pc_relative ? outrel.r_offset : 0;
6318 addend = 0;
6319 break;
6320 }
6321 }
6322 break;
6323
6324 case R_PPC_RELAX32PC_PLT:
6325 case R_PPC_RELAX32_PLT:
6326 {
6327 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6328
6329 if (htab->plt_type == PLT_NEW)
6330 relocation = (htab->glink->output_section->vma
6331 + htab->glink->output_offset
6332 + ent->glink_offset);
6333 else
6334 relocation = (htab->plt->output_section->vma
6335 + htab->plt->output_offset
6336 + ent->plt.offset);
6337 addend = 0;
6338 }
6339 if (r_type == R_PPC_RELAX32_PLT)
6340 goto relax32;
6341 /* Fall thru */
6342
6343 case R_PPC_RELAX32PC:
6344 relocation -= (input_section->output_section->vma
6345 + input_section->output_offset
6346 + rel->r_offset - 4);
6347 /* Fall thru */
6348
6349 case R_PPC_RELAX32:
6350 relax32:
6351 {
6352 unsigned long t0;
6353 unsigned long t1;
6354
6355 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6356 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6357
6358 /* We're clearing the bits for R_PPC_ADDR16_HA
6359 and R_PPC_ADDR16_LO here. */
6360 t0 &= ~0xffff;
6361 t1 &= ~0xffff;
6362
6363 /* t0 is HA, t1 is LO */
6364 relocation += addend;
6365 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6366 t1 |= relocation & 0xffff;
6367
6368 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6369 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6370 }
6371 continue;
6372
6373 /* Indirect .sdata relocation. */
6374 case R_PPC_EMB_SDAI16:
6375 BFD_ASSERT (htab->sdata[0].section != NULL);
6376 relocation
6377 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6378 h, relocation, rel);
6379 break;
6380
6381 /* Indirect .sdata2 relocation. */
6382 case R_PPC_EMB_SDA2I16:
6383 BFD_ASSERT (htab->sdata[1].section != NULL);
6384 relocation
6385 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6386 h, relocation, rel);
6387 break;
6388
6389 /* Handle the TOC16 reloc. We want to use the offset within the .got
6390 section, not the actual VMA. This is appropriate when generating
6391 an embedded ELF object, for which the .got section acts like the
6392 AIX .toc section. */
6393 case R_PPC_TOC16: /* phony GOT16 relocations */
6394 BFD_ASSERT (sec != NULL);
6395 BFD_ASSERT (bfd_is_und_section (sec)
6396 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6397 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6398
6399 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6400 break;
6401
6402 case R_PPC_PLTREL24:
6403 /* Relocation is to the entry for this symbol in the
6404 procedure linkage table. */
6405 {
6406 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6407
6408 addend = 0;
6409 if (ent == NULL
6410 || htab->plt == NULL)
6411 {
6412 /* We didn't make a PLT entry for this symbol. This
6413 happens when statically linking PIC code, or when
6414 using -Bsymbolic. */
6415 break;
6416 }
6417
6418 unresolved_reloc = FALSE;
6419 if (htab->plt_type == PLT_NEW)
6420 relocation = (htab->glink->output_section->vma
6421 + htab->glink->output_offset
6422 + ent->glink_offset);
6423 else
6424 relocation = (htab->plt->output_section->vma
6425 + htab->plt->output_offset
6426 + ent->plt.offset);
6427 }
6428 break;
6429
6430 /* Relocate against _SDA_BASE_. */
6431 case R_PPC_SDAREL16:
6432 {
6433 const char *name;
6434 struct elf_link_hash_entry *sh;
6435
6436 BFD_ASSERT (sec != NULL);
6437 name = bfd_get_section_name (abfd, sec->output_section);
6438 if (! ((strncmp (name, ".sdata", 6) == 0
6439 && (name[6] == 0 || name[6] == '.'))
6440 || (strncmp (name, ".sbss", 5) == 0
6441 && (name[5] == 0 || name[5] == '.'))))
6442 {
6443 (*_bfd_error_handler)
6444 (_("%B: the target (%s) of a %s relocation is "
6445 "in the wrong output section (%s)"),
6446 input_bfd,
6447 sym_name,
6448 howto->name,
6449 name);
6450 }
6451 sh = htab->sdata[0].sym;
6452 addend -= (sh->root.u.def.value
6453 + sh->root.u.def.section->output_offset
6454 + sh->root.u.def.section->output_section->vma);
6455 }
6456 break;
6457
6458 /* Relocate against _SDA2_BASE_. */
6459 case R_PPC_EMB_SDA2REL:
6460 {
6461 const char *name;
6462 struct elf_link_hash_entry *sh;
6463
6464 BFD_ASSERT (sec != NULL);
6465 name = bfd_get_section_name (abfd, sec->output_section);
6466 if (! (strncmp (name, ".sdata2", 7) == 0
6467 || strncmp (name, ".sbss2", 6) == 0))
6468 {
6469 (*_bfd_error_handler)
6470 (_("%B: the target (%s) of a %s relocation is "
6471 "in the wrong output section (%s)"),
6472 input_bfd,
6473 sym_name,
6474 howto->name,
6475 name);
6476
6477 bfd_set_error (bfd_error_bad_value);
6478 ret = FALSE;
6479 continue;
6480 }
6481 sh = htab->sdata[1].sym;
6482 addend -= (sh->root.u.def.value
6483 + sh->root.u.def.section->output_offset
6484 + sh->root.u.def.section->output_section->vma);
6485 }
6486 break;
6487
6488 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6489 case R_PPC_EMB_SDA21:
6490 case R_PPC_EMB_RELSDA:
6491 {
6492 const char *name;
6493 int reg;
6494 struct elf_link_hash_entry *sh;
6495
6496 BFD_ASSERT (sec != NULL);
6497 name = bfd_get_section_name (abfd, sec->output_section);
6498 if (((strncmp (name, ".sdata", 6) == 0
6499 && (name[6] == 0 || name[6] == '.'))
6500 || (strncmp (name, ".sbss", 5) == 0
6501 && (name[5] == 0 || name[5] == '.'))))
6502 {
6503 reg = 13;
6504 sh = htab->sdata[0].sym;
6505 addend -= (sh->root.u.def.value
6506 + sh->root.u.def.section->output_offset
6507 + sh->root.u.def.section->output_section->vma);
6508 }
6509
6510 else if (strncmp (name, ".sdata2", 7) == 0
6511 || strncmp (name, ".sbss2", 6) == 0)
6512 {
6513 reg = 2;
6514 sh = htab->sdata[1].sym;
6515 addend -= (sh->root.u.def.value
6516 + sh->root.u.def.section->output_offset
6517 + sh->root.u.def.section->output_section->vma);
6518 }
6519
6520 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6521 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6522 {
6523 reg = 0;
6524 }
6525
6526 else
6527 {
6528 (*_bfd_error_handler)
6529 (_("%B: the target (%s) of a %s relocation is "
6530 "in the wrong output section (%s)"),
6531 input_bfd,
6532 sym_name,
6533 howto->name,
6534 name);
6535
6536 bfd_set_error (bfd_error_bad_value);
6537 ret = FALSE;
6538 continue;
6539 }
6540
6541 if (r_type == R_PPC_EMB_SDA21)
6542 { /* fill in register field */
6543 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6544 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6545 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6546 }
6547 }
6548 break;
6549
6550 /* Relocate against the beginning of the section. */
6551 case R_PPC_SECTOFF:
6552 case R_PPC_SECTOFF_LO:
6553 case R_PPC_SECTOFF_HI:
6554 case R_PPC_SECTOFF_HA:
6555 BFD_ASSERT (sec != NULL);
6556 addend -= sec->output_section->vma;
6557 break;
6558
6559 /* Negative relocations. */
6560 case R_PPC_EMB_NADDR32:
6561 case R_PPC_EMB_NADDR16:
6562 case R_PPC_EMB_NADDR16_LO:
6563 case R_PPC_EMB_NADDR16_HI:
6564 case R_PPC_EMB_NADDR16_HA:
6565 addend -= 2 * relocation;
6566 break;
6567
6568 case R_PPC_COPY:
6569 case R_PPC_GLOB_DAT:
6570 case R_PPC_JMP_SLOT:
6571 case R_PPC_RELATIVE:
6572 case R_PPC_PLT32:
6573 case R_PPC_PLTREL32:
6574 case R_PPC_PLT16_LO:
6575 case R_PPC_PLT16_HI:
6576 case R_PPC_PLT16_HA:
6577 case R_PPC_ADDR30:
6578 case R_PPC_EMB_RELSEC16:
6579 case R_PPC_EMB_RELST_LO:
6580 case R_PPC_EMB_RELST_HI:
6581 case R_PPC_EMB_RELST_HA:
6582 case R_PPC_EMB_BIT_FLD:
6583 (*_bfd_error_handler)
6584 (_("%B: relocation %s is not yet supported for symbol %s."),
6585 input_bfd,
6586 howto->name,
6587 sym_name);
6588
6589 bfd_set_error (bfd_error_invalid_operation);
6590 ret = FALSE;
6591 continue;
6592 }
6593
6594 /* Do any further special processing. */
6595 switch (r_type)
6596 {
6597 default:
6598 break;
6599
6600 case R_PPC_ADDR16_HA:
6601 case R_PPC_REL16_HA:
6602 case R_PPC_GOT16_HA:
6603 case R_PPC_PLT16_HA:
6604 case R_PPC_SECTOFF_HA:
6605 case R_PPC_TPREL16_HA:
6606 case R_PPC_DTPREL16_HA:
6607 case R_PPC_GOT_TLSGD16_HA:
6608 case R_PPC_GOT_TLSLD16_HA:
6609 case R_PPC_GOT_TPREL16_HA:
6610 case R_PPC_GOT_DTPREL16_HA:
6611 case R_PPC_EMB_NADDR16_HA:
6612 case R_PPC_EMB_RELST_HA:
6613 /* It's just possible that this symbol is a weak symbol
6614 that's not actually defined anywhere. In that case,
6615 'sec' would be NULL, and we should leave the symbol
6616 alone (it will be set to zero elsewhere in the link). */
6617 if (sec != NULL)
6618 /* Add 0x10000 if sign bit in 0:15 is set.
6619 Bits 0:15 are not used. */
6620 addend += 0x8000;
6621 break;
6622 }
6623
6624 #ifdef DEBUG
6625 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6626 "offset = %ld, addend = %ld\n",
6627 howto->name,
6628 (int) r_type,
6629 sym_name,
6630 r_symndx,
6631 (long) rel->r_offset,
6632 (long) addend);
6633 #endif
6634
6635 if (unresolved_reloc
6636 && !((input_section->flags & SEC_DEBUGGING) != 0
6637 && h->def_dynamic))
6638 {
6639 (*_bfd_error_handler)
6640 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6641 input_bfd,
6642 input_section,
6643 (long) rel->r_offset,
6644 howto->name,
6645 sym_name);
6646 ret = FALSE;
6647 }
6648
6649 r = _bfd_final_link_relocate (howto,
6650 input_bfd,
6651 input_section,
6652 contents,
6653 rel->r_offset,
6654 relocation,
6655 addend);
6656
6657 if (r != bfd_reloc_ok)
6658 {
6659 if (r == bfd_reloc_overflow)
6660 {
6661 if (warned)
6662 continue;
6663 if (h != NULL
6664 && h->root.type == bfd_link_hash_undefweak
6665 && howto->pc_relative)
6666 {
6667 /* Assume this is a call protected by other code that
6668 detect the symbol is undefined. If this is the case,
6669 we can safely ignore the overflow. If not, the
6670 program is hosed anyway, and a little warning isn't
6671 going to help. */
6672
6673 continue;
6674 }
6675
6676 if (! (*info->callbacks->reloc_overflow) (info,
6677 (h ? &h->root : NULL),
6678 sym_name,
6679 howto->name,
6680 rel->r_addend,
6681 input_bfd,
6682 input_section,
6683 rel->r_offset))
6684 return FALSE;
6685 }
6686 else
6687 {
6688 (*_bfd_error_handler)
6689 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6690 input_bfd, input_section,
6691 (long) rel->r_offset, howto->name, sym_name, (int) r);
6692 ret = FALSE;
6693 }
6694 }
6695 }
6696
6697 #ifdef DEBUG
6698 fprintf (stderr, "\n");
6699 #endif
6700
6701 return ret;
6702 }
6703 \f
6704 #define PPC_LO(v) ((v) & 0xffff)
6705 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6706 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6707
6708 /* Finish up dynamic symbol handling. We set the contents of various
6709 dynamic sections here. */
6710
6711 static bfd_boolean
6712 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6713 struct bfd_link_info *info,
6714 struct elf_link_hash_entry *h,
6715 Elf_Internal_Sym *sym)
6716 {
6717 struct ppc_elf_link_hash_table *htab;
6718 struct plt_entry *ent;
6719 bfd_boolean doneone;
6720
6721 #ifdef DEBUG
6722 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6723 h->root.root.string);
6724 #endif
6725
6726 htab = ppc_elf_hash_table (info);
6727 BFD_ASSERT (htab->elf.dynobj != NULL);
6728
6729 doneone = FALSE;
6730 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6731 if (ent->plt.offset != (bfd_vma) -1)
6732 {
6733 if (!doneone)
6734 {
6735 Elf_Internal_Rela rela;
6736 bfd_byte *loc;
6737 bfd_vma reloc_index;
6738
6739 if (htab->plt_type == PLT_NEW)
6740 reloc_index = ent->plt.offset / 4;
6741 else
6742 {
6743 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6744 / htab->plt_slot_size);
6745 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6746 && htab->plt_type == PLT_OLD)
6747 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6748 }
6749
6750 /* This symbol has an entry in the procedure linkage table.
6751 Set it up. */
6752 if (htab->plt_type == PLT_VXWORKS)
6753 {
6754 bfd_vma got_offset;
6755 const bfd_vma *plt_entry;
6756
6757 /* The first three entries in .got.plt are reserved. */
6758 got_offset = (reloc_index + 3) * 4;
6759
6760 /* Use the right PLT. */
6761 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6762 : ppc_elf_vxworks_plt_entry;
6763
6764 /* Fill in the .plt on VxWorks. */
6765 if (info->shared)
6766 {
6767 bfd_vma got_offset_hi = (got_offset >> 16)
6768 + ((got_offset & 0x8000) >> 15);
6769
6770 bfd_put_32 (output_bfd,
6771 plt_entry[0] | (got_offset_hi & 0xffff),
6772 htab->plt->contents + ent->plt.offset + 0);
6773 bfd_put_32 (output_bfd,
6774 plt_entry[1] | (got_offset & 0xffff),
6775 htab->plt->contents + ent->plt.offset + 4);
6776 }
6777 else
6778 {
6779 bfd_vma got_loc
6780 = (got_offset
6781 + htab->elf.hgot->root.u.def.value
6782 + htab->elf.hgot->root.u.def.section->output_offset
6783 + htab->elf.hgot->root.u.def.section->output_section->vma);
6784 bfd_vma got_loc_hi = (got_loc >> 16)
6785 + ((got_loc & 0x8000) >> 15);
6786
6787 bfd_put_32 (output_bfd,
6788 plt_entry[0] | (got_loc_hi & 0xffff),
6789 htab->plt->contents + ent->plt.offset + 0);
6790 bfd_put_32 (output_bfd,
6791 plt_entry[1] | (got_loc & 0xffff),
6792 htab->plt->contents + ent->plt.offset + 4);
6793 }
6794
6795 bfd_put_32 (output_bfd, plt_entry[2],
6796 htab->plt->contents + ent->plt.offset + 8);
6797 bfd_put_32 (output_bfd, plt_entry[3],
6798 htab->plt->contents + ent->plt.offset + 12);
6799
6800 /* This instruction is an immediate load. The value loaded is
6801 the byte offset of the R_PPC_JMP_SLOT relocation from the
6802 start of the .rela.plt section. The value is stored in the
6803 low-order 16 bits of the load instruction. */
6804 /* NOTE: It appears that this is now an index rather than a
6805 prescaled offset. */
6806 bfd_put_32 (output_bfd,
6807 plt_entry[4] | reloc_index,
6808 htab->plt->contents + ent->plt.offset + 16);
6809 /* This instruction is a PC-relative branch whose target is
6810 the start of the PLT section. The address of this branch
6811 instruction is 20 bytes beyond the start of this PLT entry.
6812 The address is encoded in bits 6-29, inclusive. The value
6813 stored is right-shifted by two bits, permitting a 26-bit
6814 offset. */
6815 bfd_put_32 (output_bfd,
6816 (plt_entry[5]
6817 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6818 htab->plt->contents + ent->plt.offset + 20);
6819 bfd_put_32 (output_bfd, plt_entry[6],
6820 htab->plt->contents + ent->plt.offset + 24);
6821 bfd_put_32 (output_bfd, plt_entry[7],
6822 htab->plt->contents + ent->plt.offset + 28);
6823
6824 /* Fill in the GOT entry corresponding to this PLT slot with
6825 the address immediately after the the "bctr" instruction
6826 in this PLT entry. */
6827 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6828 + htab->plt->output_offset
6829 + ent->plt.offset + 16),
6830 htab->sgotplt->contents + got_offset);
6831
6832 if (!info->shared)
6833 {
6834 /* Fill in a couple of entries in .rela.plt.unloaded. */
6835 loc = htab->srelplt2->contents
6836 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6837 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6838 * sizeof (Elf32_External_Rela));
6839
6840 /* Provide the @ha relocation for the first instruction. */
6841 rela.r_offset = (htab->plt->output_section->vma
6842 + htab->plt->output_offset
6843 + ent->plt.offset + 2);
6844 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6845 R_PPC_ADDR16_HA);
6846 rela.r_addend = got_offset;
6847 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6848 loc += sizeof (Elf32_External_Rela);
6849
6850 /* Provide the @l relocation for the second instruction. */
6851 rela.r_offset = (htab->plt->output_section->vma
6852 + htab->plt->output_offset
6853 + ent->plt.offset + 6);
6854 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6855 R_PPC_ADDR16_LO);
6856 rela.r_addend = got_offset;
6857 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6858 loc += sizeof (Elf32_External_Rela);
6859
6860 /* Provide a relocation for the GOT entry corresponding to this
6861 PLT slot. Point it at the middle of the .plt entry. */
6862 rela.r_offset = (htab->sgotplt->output_section->vma
6863 + htab->sgotplt->output_offset
6864 + got_offset);
6865 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6866 R_PPC_ADDR32);
6867 rela.r_addend = ent->plt.offset + 16;
6868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6869 }
6870
6871 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6872 In particular, the offset for the relocation is not the
6873 address of the PLT entry for this function, as specified
6874 by the ABI. Instead, the offset is set to the address of
6875 the GOT slot for this function. See EABI 4.4.4.1. */
6876 rela.r_offset = (htab->sgotplt->output_section->vma
6877 + htab->sgotplt->output_offset
6878 + got_offset);
6879
6880 }
6881 else
6882 {
6883 rela.r_offset = (htab->plt->output_section->vma
6884 + htab->plt->output_offset
6885 + ent->plt.offset);
6886 if (htab->plt_type == PLT_OLD)
6887 {
6888 /* We don't need to fill in the .plt. The ppc dynamic
6889 linker will fill it in. */
6890 }
6891 else
6892 {
6893 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6894 + htab->glink->output_section->vma
6895 + htab->glink->output_offset);
6896 bfd_put_32 (output_bfd, val,
6897 htab->plt->contents + ent->plt.offset);
6898 }
6899 }
6900
6901 /* Fill in the entry in the .rela.plt section. */
6902 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6903 rela.r_addend = 0;
6904
6905 loc = (htab->relplt->contents
6906 + reloc_index * sizeof (Elf32_External_Rela));
6907 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6908
6909 if (!h->def_regular)
6910 {
6911 /* Mark the symbol as undefined, rather than as defined in
6912 the .plt section. Leave the value alone. */
6913 sym->st_shndx = SHN_UNDEF;
6914 /* If the symbol is weak, we do need to clear the value.
6915 Otherwise, the PLT entry would provide a definition for
6916 the symbol even if the symbol wasn't defined anywhere,
6917 and so the symbol would never be NULL. */
6918 if (!h->ref_regular_nonweak)
6919 sym->st_value = 0;
6920 }
6921 doneone = TRUE;
6922 }
6923
6924 if (htab->plt_type == PLT_NEW)
6925 {
6926 bfd_vma plt;
6927 unsigned char *p;
6928
6929 plt = (ent->plt.offset
6930 + htab->plt->output_section->vma
6931 + htab->plt->output_offset);
6932 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6933
6934 if (info->shared || info->pie)
6935 {
6936 bfd_vma got = 0;
6937
6938 if (ent->addend >= 32768)
6939 got = (ent->addend
6940 + ent->sec->output_section->vma
6941 + ent->sec->output_offset);
6942 else if (htab->elf.hgot != NULL)
6943 got = (htab->elf.hgot->root.u.def.value
6944 + htab->elf.hgot->root.u.def.section->output_section->vma
6945 + htab->elf.hgot->root.u.def.section->output_offset);
6946
6947 plt -= got;
6948
6949 if (plt + 0x8000 < 0x10000)
6950 {
6951 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6952 p += 4;
6953 bfd_put_32 (output_bfd, MTCTR_11, p);
6954 p += 4;
6955 bfd_put_32 (output_bfd, BCTR, p);
6956 p += 4;
6957 bfd_put_32 (output_bfd, NOP, p);
6958 p += 4;
6959 }
6960 else
6961 {
6962 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6963 p += 4;
6964 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6965 p += 4;
6966 bfd_put_32 (output_bfd, MTCTR_11, p);
6967 p += 4;
6968 bfd_put_32 (output_bfd, BCTR, p);
6969 p += 4;
6970 }
6971 }
6972 else
6973 {
6974 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6975 p += 4;
6976 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6977 p += 4;
6978 bfd_put_32 (output_bfd, MTCTR_11, p);
6979 p += 4;
6980 bfd_put_32 (output_bfd, BCTR, p);
6981 p += 4;
6982
6983 /* We only need one non-PIC glink stub. */
6984 break;
6985 }
6986 }
6987 else
6988 break;
6989 }
6990
6991 if (h->needs_copy)
6992 {
6993 asection *s;
6994 Elf_Internal_Rela rela;
6995 bfd_byte *loc;
6996
6997 /* This symbols needs a copy reloc. Set it up. */
6998
6999 #ifdef DEBUG
7000 fprintf (stderr, ", copy");
7001 #endif
7002
7003 BFD_ASSERT (h->dynindx != -1);
7004
7005 if (ppc_elf_hash_entry (h)->has_sda_refs)
7006 s = htab->relsbss;
7007 else
7008 s = htab->relbss;
7009 BFD_ASSERT (s != NULL);
7010
7011 rela.r_offset = (h->root.u.def.value
7012 + h->root.u.def.section->output_section->vma
7013 + h->root.u.def.section->output_offset);
7014 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7015 rela.r_addend = 0;
7016 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7017 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7018 }
7019
7020 #ifdef DEBUG
7021 fprintf (stderr, "\n");
7022 #endif
7023
7024 /* Mark some specially defined symbols as absolute. */
7025 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7026 || (!htab->is_vxworks
7027 && (h == htab->elf.hgot
7028 || strcmp (h->root.root.string,
7029 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7030 sym->st_shndx = SHN_ABS;
7031
7032 return TRUE;
7033 }
7034 \f
7035 static enum elf_reloc_type_class
7036 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7037 {
7038 switch (ELF32_R_TYPE (rela->r_info))
7039 {
7040 case R_PPC_RELATIVE:
7041 return reloc_class_relative;
7042 case R_PPC_REL24:
7043 case R_PPC_ADDR24:
7044 case R_PPC_JMP_SLOT:
7045 return reloc_class_plt;
7046 case R_PPC_COPY:
7047 return reloc_class_copy;
7048 default:
7049 return reloc_class_normal;
7050 }
7051 }
7052 \f
7053 /* Finish up the dynamic sections. */
7054
7055 static bfd_boolean
7056 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7057 struct bfd_link_info *info)
7058 {
7059 asection *sdyn;
7060 asection *splt;
7061 struct ppc_elf_link_hash_table *htab;
7062 bfd_vma got;
7063 bfd * dynobj;
7064
7065 #ifdef DEBUG
7066 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7067 #endif
7068
7069 htab = ppc_elf_hash_table (info);
7070 dynobj = elf_hash_table (info)->dynobj;
7071 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7072 if (htab->is_vxworks)
7073 splt = bfd_get_section_by_name (dynobj, ".plt");
7074 else
7075 splt = NULL;
7076
7077 got = 0;
7078 if (htab->elf.hgot != NULL)
7079 got = (htab->elf.hgot->root.u.def.value
7080 + htab->elf.hgot->root.u.def.section->output_section->vma
7081 + htab->elf.hgot->root.u.def.section->output_offset);
7082
7083 if (htab->elf.dynamic_sections_created)
7084 {
7085 Elf32_External_Dyn *dyncon, *dynconend;
7086
7087 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7088
7089 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7090 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7091 for (; dyncon < dynconend; dyncon++)
7092 {
7093 Elf_Internal_Dyn dyn;
7094 asection *s;
7095
7096 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7097
7098 switch (dyn.d_tag)
7099 {
7100 case DT_PLTGOT:
7101 if (htab->is_vxworks)
7102 s = htab->sgotplt;
7103 else
7104 s = htab->plt;
7105 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7106 break;
7107
7108 case DT_PLTRELSZ:
7109 dyn.d_un.d_val = htab->relplt->size;
7110 break;
7111
7112 case DT_JMPREL:
7113 s = htab->relplt;
7114 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7115 break;
7116
7117 case DT_PPC_GOT:
7118 dyn.d_un.d_ptr = got;
7119 break;
7120
7121 case DT_RELASZ:
7122 if (htab->is_vxworks)
7123 {
7124 if (htab->relplt)
7125 dyn.d_un.d_ptr -= htab->relplt->size;
7126 break;
7127 }
7128 continue;
7129
7130 default:
7131 continue;
7132 }
7133
7134 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7135 }
7136 }
7137
7138 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7139 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7140 if (htab->got != NULL)
7141 {
7142 unsigned char *p = htab->got->contents;
7143 bfd_vma val;
7144
7145 p += htab->elf.hgot->root.u.def.value;
7146 if (htab->plt_type == PLT_OLD)
7147 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7148
7149 val = 0;
7150 if (sdyn != NULL)
7151 val = sdyn->output_section->vma + sdyn->output_offset;
7152 bfd_put_32 (output_bfd, val, p);
7153
7154 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7155 }
7156
7157 /* Fill in the first entry in the VxWorks procedure linkage table. */
7158 if (splt && splt->size > 0)
7159 {
7160 /* Use the right PLT. */
7161 static const bfd_vma *plt_entry = NULL;
7162 plt_entry = info->shared ?
7163 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7164
7165 if (!info->shared)
7166 {
7167 bfd_vma got_value =
7168 (htab->elf.hgot->root.u.def.section->output_section->vma
7169 + htab->elf.hgot->root.u.def.section->output_offset
7170 + htab->elf.hgot->root.u.def.value);
7171 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7172
7173 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7174 splt->contents + 0);
7175 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7176 splt->contents + 4);
7177 }
7178 else
7179 {
7180 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7181 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7182 }
7183 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7184 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7185 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7186 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7187 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7188 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7189
7190 if (! info->shared)
7191 {
7192 Elf_Internal_Rela rela;
7193 bfd_byte *loc;
7194
7195 loc = htab->srelplt2->contents;
7196
7197 /* Output the @ha relocation for the first instruction. */
7198 rela.r_offset = (htab->plt->output_section->vma
7199 + htab->plt->output_offset
7200 + 2);
7201 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7202 rela.r_addend = 0;
7203 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7204 loc += sizeof (Elf32_External_Rela);
7205
7206 /* Output the @l relocation for the second instruction. */
7207 rela.r_offset = (htab->plt->output_section->vma
7208 + htab->plt->output_offset
7209 + 6);
7210 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7211 rela.r_addend = 0;
7212 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7213 loc += sizeof (Elf32_External_Rela);
7214
7215 /* Fix up the remaining relocations. They may have the wrong
7216 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7217 in which symbols were output. */
7218 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7219 {
7220 Elf_Internal_Rela rel;
7221
7222 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7223 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7224 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7225 loc += sizeof (Elf32_External_Rela);
7226
7227 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7228 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7229 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7230 loc += sizeof (Elf32_External_Rela);
7231
7232 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7233 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7234 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7235 loc += sizeof (Elf32_External_Rela);
7236 }
7237 }
7238 }
7239
7240 if (htab->glink != NULL && htab->glink->contents != NULL)
7241 {
7242 unsigned char *p;
7243 unsigned char *endp;
7244 bfd_vma res0;
7245 unsigned int i;
7246
7247 /*
7248 * PIC glink code is the following:
7249 *
7250 * # ith PLT code stub.
7251 * addis 11,30,(plt+(i-1)*4-got)@ha
7252 * lwz 11,(plt+(i-1)*4-got)@l(11)
7253 * mtctr 11
7254 * bctr
7255 *
7256 * # A table of branches, one for each plt entry.
7257 * # The idea is that the plt call stub loads ctr (and r11) with these
7258 * # addresses, so (r11 - res_0) gives the plt index * 4.
7259 * res_0: b PLTresolve
7260 * res_1: b PLTresolve
7261 * .
7262 * # Some number of entries towards the end can be nops
7263 * res_n_m3: nop
7264 * res_n_m2: nop
7265 * res_n_m1:
7266 *
7267 * PLTresolve:
7268 * addis 11,11,(1f-res_0)@ha
7269 * mflr 0
7270 * bcl 20,31,1f
7271 * 1: addi 11,11,(1b-res_0)@l
7272 * mflr 12
7273 * mtlr 0
7274 * sub 11,11,12 # r11 = index * 4
7275 * addis 12,12,(got+4-1b)@ha
7276 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7277 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7278 * mtctr 0
7279 * add 0,11,11
7280 * add 11,0,11 # r11 = index * 12 = reloc offset.
7281 * bctr
7282 */
7283 static const unsigned int pic_plt_resolve[] =
7284 {
7285 ADDIS_11_11,
7286 MFLR_0,
7287 BCL_20_31,
7288 ADDI_11_11,
7289 MFLR_12,
7290 MTLR_0,
7291 SUB_11_11_12,
7292 ADDIS_12_12,
7293 LWZ_0_12,
7294 LWZ_12_12,
7295 MTCTR_0,
7296 ADD_0_11_11,
7297 ADD_11_0_11,
7298 BCTR,
7299 NOP,
7300 NOP
7301 };
7302
7303 static const unsigned int plt_resolve[] =
7304 {
7305 LIS_12,
7306 ADDIS_11_11,
7307 LWZ_0_12,
7308 ADDI_11_11,
7309 MTCTR_0,
7310 ADD_0_11_11,
7311 LWZ_12_12,
7312 ADD_11_0_11,
7313 BCTR,
7314 NOP,
7315 NOP,
7316 NOP,
7317 NOP,
7318 NOP,
7319 NOP,
7320 NOP
7321 };
7322
7323 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7324 abort ();
7325 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7326 abort ();
7327
7328 /* Build the branch table, one for each plt entry (less one),
7329 and perhaps some padding. */
7330 p = htab->glink->contents;
7331 p += htab->glink_pltresolve;
7332 endp = htab->glink->contents;
7333 endp += htab->glink->size - GLINK_PLTRESOLVE;
7334 while (p < endp - 8 * 4)
7335 {
7336 bfd_put_32 (output_bfd, B + endp - p, p);
7337 p += 4;
7338 }
7339 while (p < endp)
7340 {
7341 bfd_put_32 (output_bfd, NOP, p);
7342 p += 4;
7343 }
7344
7345 res0 = (htab->glink_pltresolve
7346 + htab->glink->output_section->vma
7347 + htab->glink->output_offset);
7348
7349 /* Last comes the PLTresolve stub. */
7350 if (info->shared || info->pie)
7351 {
7352 bfd_vma bcl;
7353
7354 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7355 {
7356 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7357 p += 4;
7358 }
7359 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7360
7361 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7362 + htab->glink->output_section->vma
7363 + htab->glink->output_offset);
7364
7365 bfd_put_32 (output_bfd,
7366 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7367 bfd_put_32 (output_bfd,
7368 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7369 bfd_put_32 (output_bfd,
7370 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7371 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7372 {
7373 bfd_put_32 (output_bfd,
7374 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7375 bfd_put_32 (output_bfd,
7376 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7377 }
7378 else
7379 {
7380 bfd_put_32 (output_bfd,
7381 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7382 bfd_put_32 (output_bfd,
7383 LWZ_12_12 + 4, p + 9*4);
7384 }
7385 }
7386 else
7387 {
7388 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7389 {
7390 bfd_put_32 (output_bfd, plt_resolve[i], p);
7391 p += 4;
7392 }
7393 p -= 4 * ARRAY_SIZE (plt_resolve);
7394
7395 bfd_put_32 (output_bfd,
7396 LIS_12 + PPC_HA (got + 4), p + 0*4);
7397 bfd_put_32 (output_bfd,
7398 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7399 bfd_put_32 (output_bfd,
7400 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7401 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7402 {
7403 bfd_put_32 (output_bfd,
7404 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7405 bfd_put_32 (output_bfd,
7406 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7407 }
7408 else
7409 {
7410 bfd_put_32 (output_bfd,
7411 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7412 bfd_put_32 (output_bfd,
7413 LWZ_12_12 + 4, p + 6*4);
7414 }
7415 }
7416 }
7417
7418 return TRUE;
7419 }
7420 \f
7421 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7422 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7423 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7424 #define TARGET_BIG_NAME "elf32-powerpc"
7425 #define ELF_ARCH bfd_arch_powerpc
7426 #define ELF_MACHINE_CODE EM_PPC
7427 #ifdef __QNXTARGET__
7428 #define ELF_MAXPAGESIZE 0x1000
7429 #else
7430 #define ELF_MAXPAGESIZE 0x10000
7431 #endif
7432 #define ELF_MINPAGESIZE 0x1000
7433 #define elf_info_to_howto ppc_elf_info_to_howto
7434
7435 #ifdef EM_CYGNUS_POWERPC
7436 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7437 #endif
7438
7439 #ifdef EM_PPC_OLD
7440 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7441 #endif
7442
7443 #define elf_backend_plt_not_loaded 1
7444 #define elf_backend_can_gc_sections 1
7445 #define elf_backend_can_refcount 1
7446 #define elf_backend_rela_normal 1
7447
7448 #define bfd_elf32_mkobject ppc_elf_mkobject
7449 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7450 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7451 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7452 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7453 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7454
7455 #define elf_backend_object_p ppc_elf_object_p
7456 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7457 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7458 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7459 #define elf_backend_relocate_section ppc_elf_relocate_section
7460 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7461 #define elf_backend_check_relocs ppc_elf_check_relocs
7462 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7463 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7464 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7465 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7466 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7467 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7468 #define elf_backend_fake_sections ppc_elf_fake_sections
7469 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7470 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7471 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7472 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7473 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7474 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7475 #define elf_backend_write_section ppc_elf_write_section
7476 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7477 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7478 #define elf_backend_action_discarded ppc_elf_action_discarded
7479
7480 #include "elf32-target.h"
7481
7482 /* VxWorks Target */
7483
7484 #undef TARGET_LITTLE_SYM
7485 #undef TARGET_LITTLE_NAME
7486
7487 #undef TARGET_BIG_SYM
7488 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7489 #undef TARGET_BIG_NAME
7490 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7491
7492 /* VxWorks uses the elf default section flags for .plt. */
7493 static const struct bfd_elf_special_section *
7494 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7495 {
7496 if (sec->name == NULL)
7497 return NULL;
7498
7499 if (strcmp (sec->name, ".plt") == 0)
7500 return _bfd_elf_get_sec_type_attr (abfd, sec);
7501
7502 return ppc_elf_get_sec_type_attr (abfd, sec);
7503 }
7504
7505 /* Like ppc_elf_link_hash_table_create, but overrides
7506 appropriately for VxWorks. */
7507 static struct bfd_link_hash_table *
7508 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7509 {
7510 struct bfd_link_hash_table *ret;
7511
7512 ret = ppc_elf_link_hash_table_create (abfd);
7513 if (ret)
7514 {
7515 struct ppc_elf_link_hash_table *htab
7516 = (struct ppc_elf_link_hash_table *)ret;
7517 htab->is_vxworks = 1;
7518 htab->plt_type = PLT_VXWORKS;
7519 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7520 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7521 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7522 }
7523 return ret;
7524 }
7525
7526 /* Tweak magic VxWorks symbols as they are loaded. */
7527 static bfd_boolean
7528 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7529 struct bfd_link_info *info,
7530 Elf_Internal_Sym *sym,
7531 const char **namep ATTRIBUTE_UNUSED,
7532 flagword *flagsp ATTRIBUTE_UNUSED,
7533 asection **secp,
7534 bfd_vma *valp)
7535 {
7536 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7537 valp))
7538 return FALSE;
7539
7540 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7541 }
7542
7543 static void
7544 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7545 {
7546 ppc_elf_final_write_processing(abfd, linker);
7547 elf_vxworks_final_write_processing(abfd, linker);
7548 }
7549
7550 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7551 define it. */
7552 #undef elf_backend_want_plt_sym
7553 #define elf_backend_want_plt_sym 1
7554 #undef elf_backend_want_got_plt
7555 #define elf_backend_want_got_plt 1
7556 #undef elf_backend_got_symbol_offset
7557 #define elf_backend_got_symbol_offset 0
7558 #undef elf_backend_plt_not_loaded
7559 #define elf_backend_plt_not_loaded 0
7560 #undef elf_backend_plt_readonly
7561 #define elf_backend_plt_readonly 1
7562 #undef elf_backend_got_header_size
7563 #define elf_backend_got_header_size 12
7564
7565 #undef bfd_elf32_bfd_link_hash_table_create
7566 #define bfd_elf32_bfd_link_hash_table_create \
7567 ppc_elf_vxworks_link_hash_table_create
7568 #undef elf_backend_add_symbol_hook
7569 #define elf_backend_add_symbol_hook \
7570 ppc_elf_vxworks_add_symbol_hook
7571 #undef elf_backend_link_output_symbol_hook
7572 #define elf_backend_link_output_symbol_hook \
7573 elf_vxworks_link_output_symbol_hook
7574 #undef elf_backend_final_write_processing
7575 #define elf_backend_final_write_processing \
7576 ppc_elf_vxworks_final_write_processing
7577 #undef elf_backend_get_sec_type_attr
7578 #define elf_backend_get_sec_type_attr \
7579 ppc_elf_vxworks_get_sec_type_attr
7580 #undef elf_backend_emit_relocs
7581 #define elf_backend_emit_relocs \
7582 elf_vxworks_emit_relocs
7583
7584 #undef elf32_bed
7585 #define elf32_bed ppc_elf_vxworks_bed
7586
7587 #include "elf32-target.h"